To find all the divisors of the number 1,369,900:
- 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 1,369,900:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
1,369,900 = 22 × 52 × 7 × 19 × 103
1,369,900 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), ...
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 = (2 + 1) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 3 × 2 × 2 × 2 = 72
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 1,369,900
- 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
composite factor = 2
2 =
4
prime factor =
5
prime factor =
7
composite factor = 2 × 5 =
10
composite factor = 2 × 7 =
14
prime factor =
19
composite factor = 2
2 × 5 =
20
composite factor = 5
2 =
25
composite factor = 2
2 × 7 =
28
composite factor = 5 × 7 =
35
composite factor = 2 × 19 =
38
composite factor = 2 × 5
2 =
50
composite factor = 2 × 5 × 7 =
70
composite factor = 2
2 × 19 =
76
composite factor = 5 × 19 =
95
composite factor = 2
2 × 5
2 =
100
prime factor =
103
composite factor = 7 × 19 =
133
composite factor = 2
2 × 5 × 7 =
140
composite factor = 5
2 × 7 =
175
composite factor = 2 × 5 × 19 =
190
composite factor = 2 × 103 =
206
composite factor = 2 × 7 × 19 =
266
composite factor = 2 × 5
2 × 7 =
350
composite factor = 2
2 × 5 × 19 =
380
composite factor = 2
2 × 103 =
412
composite factor = 5
2 × 19 =
475
composite factor = 5 × 103 =
515
composite factor = 2
2 × 7 × 19 =
532
composite factor = 5 × 7 × 19 =
665
composite factor = 2
2 × 5
2 × 7 =
700
composite factor = 7 × 103 =
721
composite factor = 2 × 5
2 × 19 =
950
composite factor = 2 × 5 × 103 =
1,030
This list continues below...
... This list continues from above
composite factor = 2 × 5 × 7 × 19 =
1,330
composite factor = 2 × 7 × 103 =
1,442
composite factor = 2
2 × 5
2 × 19 =
1,900
composite factor = 19 × 103 =
1,957
composite factor = 2
2 × 5 × 103 =
2,060
composite factor = 5
2 × 103 =
2,575
composite factor = 2
2 × 5 × 7 × 19 =
2,660
composite factor = 2
2 × 7 × 103 =
2,884
composite factor = 5
2 × 7 × 19 =
3,325
composite factor = 5 × 7 × 103 =
3,605
composite factor = 2 × 19 × 103 =
3,914
composite factor = 2 × 5
2 × 103 =
5,150
composite factor = 2 × 5
2 × 7 × 19 =
6,650
composite factor = 2 × 5 × 7 × 103 =
7,210
composite factor = 2
2 × 19 × 103 =
7,828
composite factor = 5 × 19 × 103 =
9,785
composite factor = 2
2 × 5
2 × 103 =
10,300
composite factor = 2
2 × 5
2 × 7 × 19 =
13,300
composite factor = 7 × 19 × 103 =
13,699
composite factor = 2
2 × 5 × 7 × 103 =
14,420
composite factor = 5
2 × 7 × 103 =
18,025
composite factor = 2 × 5 × 19 × 103 =
19,570
composite factor = 2 × 7 × 19 × 103 =
27,398
composite factor = 2 × 5
2 × 7 × 103 =
36,050
composite factor = 2
2 × 5 × 19 × 103 =
39,140
composite factor = 5
2 × 19 × 103 =
48,925
composite factor = 2
2 × 7 × 19 × 103 =
54,796
composite factor = 5 × 7 × 19 × 103 =
68,495
composite factor = 2
2 × 5
2 × 7 × 103 =
72,100
composite factor = 2 × 5
2 × 19 × 103 =
97,850
composite factor = 2 × 5 × 7 × 19 × 103 =
136,990
composite factor = 2
2 × 5
2 × 19 × 103 =
195,700
composite factor = 2
2 × 5 × 7 × 19 × 103 =
273,980
composite factor = 5
2 × 7 × 19 × 103 =
342,475
composite factor = 2 × 5
2 × 7 × 19 × 103 =
684,950
composite factor = 2
2 × 5
2 × 7 × 19 × 103 =
1,369,900
72 factors (divisors)
What times what is 1,369,900?
What number multiplied by what number equals 1,369,900?
All the combinations of any two natural numbers whose product equals 1,369,900.
1 × 1,369,900 = 1,369,900
2 × 684,950 = 1,369,900
4 × 342,475 = 1,369,900
5 × 273,980 = 1,369,900
7 × 195,700 = 1,369,900
10 × 136,990 = 1,369,900
14 × 97,850 = 1,369,900
19 × 72,100 = 1,369,900
20 × 68,495 = 1,369,900
25 × 54,796 = 1,369,900
28 × 48,925 = 1,369,900
35 × 39,140 = 1,369,900
38 × 36,050 = 1,369,900
50 × 27,398 = 1,369,900
70 × 19,570 = 1,369,900
76 × 18,025 = 1,369,900
95 × 14,420 = 1,369,900
100 × 13,699 = 1,369,900
103 × 13,300 = 1,369,900
133 × 10,300 = 1,369,900
140 × 9,785 = 1,369,900
175 × 7,828 = 1,369,900
190 × 7,210 = 1,369,900
206 × 6,650 = 1,369,900
266 × 5,150 = 1,369,900
350 × 3,914 = 1,369,900
380 × 3,605 = 1,369,900
412 × 3,325 = 1,369,900
475 × 2,884 = 1,369,900
515 × 2,660 = 1,369,900
532 × 2,575 = 1,369,900
665 × 2,060 = 1,369,900
700 × 1,957 = 1,369,900
721 × 1,900 = 1,369,900
950 × 1,442 = 1,369,900
1,030 × 1,330 = 1,369,900
36 unique multiplications The final answer:
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