Factors of 357,840. Calculator of Proper, Improper, Prime and Compound Divisors, if Any

All the factors (divisors) of the number 357,840. Connection with the prime factorization of the number

To find all the divisors of the number 357,840:

  • 1. Decompose the number into prime factors.
  • See how you can find out how many factors (divisors) the number has, without actually calculating them.
  • 2. Multiply the prime factors in all their unique combinations, that yield different results.

1. Carry out the prime factorization of the number 357,840:

The prime factorization of a number: finding the prime numbers that multiply together to make that number.


357,840 = 24 × 32 × 5 × 7 × 71
357,840 is not a prime number but a composite one.


  • Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
  • Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
  • Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
  • Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...

  • » Online calculator. Check whether a number is prime or not. The prime factorization of composite numbers (decomposition into prime factors)


How to count the number of factors of a number?

Without actually finding the factors

  • If a number N is prime factorized as:
    N = am × bk × cz
    where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, ....
  • ...
  • Then the number of factors of the number N can be calculated as:
    n = (m + 1) × (k + 1) × (z + 1)
  • ...
  • In our case, the number of factors is calculated as:
  • n = (4 + 1) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 3 × 2 × 2 × 2 = 120

But to actually calculate the factors, see below...

2. Multiply the prime factors of the number 357,840

  • Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
  • Also consider the exponents of these prime factors.
  • Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.

All the factors (divisors) are listed below - in ascending order

The list of factors (divisors):

Numbers other than 1 that are not prime factors are composite factors (divisors).

neither prime nor composite = 1
prime factor = 2
prime factor = 3
composite factor = 22 = 4
prime factor = 5
composite factor = 2 × 3 = 6
prime factor = 7
composite factor = 23 = 8
composite factor = 32 = 9
composite factor = 2 × 5 = 10
composite factor = 22 × 3 = 12
composite factor = 2 × 7 = 14
composite factor = 3 × 5 = 15
composite factor = 24 = 16
composite factor = 2 × 32 = 18
composite factor = 22 × 5 = 20
composite factor = 3 × 7 = 21
composite factor = 23 × 3 = 24
composite factor = 22 × 7 = 28
composite factor = 2 × 3 × 5 = 30
composite factor = 5 × 7 = 35
composite factor = 22 × 32 = 36
composite factor = 23 × 5 = 40
composite factor = 2 × 3 × 7 = 42
composite factor = 32 × 5 = 45
composite factor = 24 × 3 = 48
composite factor = 23 × 7 = 56
composite factor = 22 × 3 × 5 = 60
composite factor = 32 × 7 = 63
composite factor = 2 × 5 × 7 = 70
prime factor = 71
composite factor = 23 × 32 = 72
composite factor = 24 × 5 = 80
composite factor = 22 × 3 × 7 = 84
composite factor = 2 × 32 × 5 = 90
composite factor = 3 × 5 × 7 = 105
composite factor = 24 × 7 = 112
composite factor = 23 × 3 × 5 = 120
composite factor = 2 × 32 × 7 = 126
composite factor = 22 × 5 × 7 = 140
composite factor = 2 × 71 = 142
composite factor = 24 × 32 = 144
composite factor = 23 × 3 × 7 = 168
composite factor = 22 × 32 × 5 = 180
composite factor = 2 × 3 × 5 × 7 = 210
composite factor = 3 × 71 = 213
composite factor = 24 × 3 × 5 = 240
composite factor = 22 × 32 × 7 = 252
composite factor = 23 × 5 × 7 = 280
composite factor = 22 × 71 = 284
composite factor = 32 × 5 × 7 = 315
composite factor = 24 × 3 × 7 = 336
composite factor = 5 × 71 = 355
composite factor = 23 × 32 × 5 = 360
composite factor = 22 × 3 × 5 × 7 = 420
composite factor = 2 × 3 × 71 = 426
composite factor = 7 × 71 = 497
composite factor = 23 × 32 × 7 = 504
composite factor = 24 × 5 × 7 = 560
composite factor = 23 × 71 = 568
This list continues below...

... This list continues from above
composite factor = 2 × 32 × 5 × 7 = 630
composite factor = 32 × 71 = 639
composite factor = 2 × 5 × 71 = 710
composite factor = 24 × 32 × 5 = 720
composite factor = 23 × 3 × 5 × 7 = 840
composite factor = 22 × 3 × 71 = 852
composite factor = 2 × 7 × 71 = 994
composite factor = 24 × 32 × 7 = 1,008
composite factor = 3 × 5 × 71 = 1,065
composite factor = 24 × 71 = 1,136
composite factor = 22 × 32 × 5 × 7 = 1,260
composite factor = 2 × 32 × 71 = 1,278
composite factor = 22 × 5 × 71 = 1,420
composite factor = 3 × 7 × 71 = 1,491
composite factor = 24 × 3 × 5 × 7 = 1,680
composite factor = 23 × 3 × 71 = 1,704
composite factor = 22 × 7 × 71 = 1,988
composite factor = 2 × 3 × 5 × 71 = 2,130
composite factor = 5 × 7 × 71 = 2,485
composite factor = 23 × 32 × 5 × 7 = 2,520
composite factor = 22 × 32 × 71 = 2,556
composite factor = 23 × 5 × 71 = 2,840
composite factor = 2 × 3 × 7 × 71 = 2,982
composite factor = 32 × 5 × 71 = 3,195
composite factor = 24 × 3 × 71 = 3,408
composite factor = 23 × 7 × 71 = 3,976
composite factor = 22 × 3 × 5 × 71 = 4,260
composite factor = 32 × 7 × 71 = 4,473
composite factor = 2 × 5 × 7 × 71 = 4,970
composite factor = 24 × 32 × 5 × 7 = 5,040
composite factor = 23 × 32 × 71 = 5,112
composite factor = 24 × 5 × 71 = 5,680
composite factor = 22 × 3 × 7 × 71 = 5,964
composite factor = 2 × 32 × 5 × 71 = 6,390
composite factor = 3 × 5 × 7 × 71 = 7,455
composite factor = 24 × 7 × 71 = 7,952
composite factor = 23 × 3 × 5 × 71 = 8,520
composite factor = 2 × 32 × 7 × 71 = 8,946
composite factor = 22 × 5 × 7 × 71 = 9,940
composite factor = 24 × 32 × 71 = 10,224
composite factor = 23 × 3 × 7 × 71 = 11,928
composite factor = 22 × 32 × 5 × 71 = 12,780
composite factor = 2 × 3 × 5 × 7 × 71 = 14,910
composite factor = 24 × 3 × 5 × 71 = 17,040
composite factor = 22 × 32 × 7 × 71 = 17,892
composite factor = 23 × 5 × 7 × 71 = 19,880
composite factor = 32 × 5 × 7 × 71 = 22,365
composite factor = 24 × 3 × 7 × 71 = 23,856
composite factor = 23 × 32 × 5 × 71 = 25,560
composite factor = 22 × 3 × 5 × 7 × 71 = 29,820
composite factor = 23 × 32 × 7 × 71 = 35,784
composite factor = 24 × 5 × 7 × 71 = 39,760
composite factor = 2 × 32 × 5 × 7 × 71 = 44,730
composite factor = 24 × 32 × 5 × 71 = 51,120
composite factor = 23 × 3 × 5 × 7 × 71 = 59,640
composite factor = 24 × 32 × 7 × 71 = 71,568
composite factor = 22 × 32 × 5 × 7 × 71 = 89,460
composite factor = 24 × 3 × 5 × 7 × 71 = 119,280
composite factor = 23 × 32 × 5 × 7 × 71 = 178,920
composite factor = 24 × 32 × 5 × 7 × 71 = 357,840
120 factors (divisors)

What times what is 357,840?
What number multiplied by what number equals 357,840?

All the combinations of any two natural numbers whose product equals 357,840.

1 × 357,840 = 357,840
2 × 178,920 = 357,840
3 × 119,280 = 357,840
4 × 89,460 = 357,840
5 × 71,568 = 357,840
6 × 59,640 = 357,840
7 × 51,120 = 357,840
8 × 44,730 = 357,840
9 × 39,760 = 357,840
10 × 35,784 = 357,840
12 × 29,820 = 357,840
14 × 25,560 = 357,840
15 × 23,856 = 357,840
16 × 22,365 = 357,840
18 × 19,880 = 357,840
20 × 17,892 = 357,840
21 × 17,040 = 357,840
24 × 14,910 = 357,840
28 × 12,780 = 357,840
30 × 11,928 = 357,840
35 × 10,224 = 357,840
36 × 9,940 = 357,840
40 × 8,946 = 357,840
42 × 8,520 = 357,840
45 × 7,952 = 357,840
48 × 7,455 = 357,840
56 × 6,390 = 357,840
60 × 5,964 = 357,840
63 × 5,680 = 357,840
70 × 5,112 = 357,840
71 × 5,040 = 357,840
72 × 4,970 = 357,840
80 × 4,473 = 357,840
84 × 4,260 = 357,840
90 × 3,976 = 357,840
105 × 3,408 = 357,840
112 × 3,195 = 357,840
120 × 2,982 = 357,840
126 × 2,840 = 357,840
140 × 2,556 = 357,840
142 × 2,520 = 357,840
144 × 2,485 = 357,840
168 × 2,130 = 357,840
180 × 1,988 = 357,840
210 × 1,704 = 357,840
213 × 1,680 = 357,840
240 × 1,491 = 357,840
252 × 1,420 = 357,840
280 × 1,278 = 357,840
284 × 1,260 = 357,840
315 × 1,136 = 357,840
336 × 1,065 = 357,840
355 × 1,008 = 357,840
360 × 994 = 357,840
420 × 852 = 357,840
426 × 840 = 357,840
497 × 720 = 357,840
504 × 710 = 357,840
560 × 639 = 357,840
568 × 630 = 357,840
60 unique multiplications

The final answer:
(scroll down)


357,840 has 120 factors (divisors):
1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 12; 14; 15; 16; 18; 20; 21; 24; 28; 30; 35; 36; 40; 42; 45; 48; 56; 60; 63; 70; 71; 72; 80; 84; 90; 105; 112; 120; 126; 140; 142; 144; 168; 180; 210; 213; 240; 252; 280; 284; 315; 336; 355; 360; 420; 426; 497; 504; 560; 568; 630; 639; 710; 720; 840; 852; 994; 1,008; 1,065; 1,136; 1,260; 1,278; 1,420; 1,491; 1,680; 1,704; 1,988; 2,130; 2,485; 2,520; 2,556; 2,840; 2,982; 3,195; 3,408; 3,976; 4,260; 4,473; 4,970; 5,040; 5,112; 5,680; 5,964; 6,390; 7,455; 7,952; 8,520; 8,946; 9,940; 10,224; 11,928; 12,780; 14,910; 17,040; 17,892; 19,880; 22,365; 23,856; 25,560; 29,820; 35,784; 39,760; 44,730; 51,120; 59,640; 71,568; 89,460; 119,280; 178,920 and 357,840
out of which 5 prime factors: 2; 3; 5; 7 and 71.
Numbers other than 1 that are not prime factors are composite factors (divisors).
357,840 and 1 are sometimes called improper factors, the others are called proper factors (proper divisors).

  • A quick way to find the factors (the divisors) of a number is to break it down into prime factors.
  • Then multiply the prime factors and their exponents, if any, in all their different combinations.

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Factors (divisors), common factors (common divisors), the greatest common factor, GCF (also called the greatest common divisor, GCD, or the highest common factor, HCF)

  • If the number "t" is a factor (divisor) of the number "a" then in the prime factorization of "t" we will only encounter prime factors that also occur in the prime factorization of "a".
  • If there are exponents involved, the maximum value of an exponent for any base of a power that is found in the prime factorization of "t" (powers, or multiplicities) is at most equal to the exponent of the same base that is involved in the prime factorization of "a".
  • Hint: 23 = 2 × 2 × 2 = 8. 2 is called the base and 3 is the exponent. 23 is the power and 8 is the value of the power. We sometimes say that the number 2 is raised to the power of 3.
  • For example, 12 is a factor (divisor) of 120 - the remainder is zero when dividing 120 by 12.
  • Let's look at the prime factorization of both numbers and notice the bases and the exponents that occur in the prime factorization of both numbers:
  • 12 = 2 × 2 × 3 = 22 × 3
  • 120 = 2 × 2 × 2 × 3 × 5 = 23 × 3 × 5
  • 120 contains all the prime factors of 12, and all its bases' exponents are higher than those of 12.
  • If "t" is a common factor (divisor) of "a" and "b", then the prime factorization of "t" contains only the common prime factors involved in the prime factorizations of both "a" and "b".
  • If there are exponents involved, the maximum value of an exponent for any base of a power that is found in the prime factorization of "t" is at most equal to the minimum of the exponents of the same base that is involved in the prime factorization of both "a" and "b".
  • For example, 12 is the common factor of 48 and 360.
  • The remainder is zero when dividing either 48 or 360 by 12.
  • Here there are the prime factorizations of the three numbers, 12, 48 and 360:
  • 12 = 22 × 3
  • 48 = 24 × 3
  • 360 = 23 × 32 × 5
  • Please note that 48 and 360 have more factors (divisors): 2, 3, 4, 6, 8, 12, 24. Among them, 24 is the greatest common factor, GCF (or the greatest common divisor, GCD, or the highest common factor, HCF) of 48 and 360.
  • The greatest common factor, GCF, of two numbers, "a" and "b", is the product of all the common prime factors involved in the prime factorizations of both "a" and "b", taken by the lowest exponents.
  • Based on this rule it is calculated the greatest common factor, GCF, (or the greatest common divisor GCD, HCF) of several numbers, as shown in the example below...
  • GCF, GCD (1,260; 3,024; 5,544) = ?
  • 1,260 = 22 × 32
  • 3,024 = 24 × 32 × 7
  • 5,544 = 23 × 32 × 7 × 11
  • The common prime factors are:
  • 2 - its lowest exponent (multiplicity) is: min.(2; 3; 4) = 2
  • 3 - its lowest exponent (multiplicity) is: min.(2; 2; 2) = 2
  • GCF, GCD (1,260; 3,024; 5,544) = 22 × 32 = 252
  • Coprime numbers:
  • If two numbers "a" and "b" have no other common factors (divisors) than 1, gfc, gcd, hcf (a; b) = 1, then the numbers "a" and "b" are called coprime (or relatively prime).
  • Factors of the GCF
  • If "a" and "b" are not coprime, then every common factor (divisor) of "a" and "b" is a also a factor (divisor) of the greatest common factor, GCF (greatest common divisor, GCD, highest common factor, HCF) of "a" and "b".