To find all the divisors of the number 59,640:
- 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 59,640:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
59,640 = 23 × 3 × 5 × 7 × 71
59,640 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 = (3 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 4 × 2 × 2 × 2 × 2 = 64
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 59,640
- 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 = 2
2 =
4
prime factor =
5
composite factor = 2 × 3 =
6
prime factor =
7
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 3 × 7 =
21
composite factor = 2
3 × 3 =
24
composite factor = 2
2 × 7 =
28
composite factor = 2 × 3 × 5 =
30
composite factor = 5 × 7 =
35
composite factor = 2
3 × 5 =
40
composite factor = 2 × 3 × 7 =
42
composite factor = 2
3 × 7 =
56
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 5 × 7 =
70
prime factor =
71
composite factor = 2
2 × 3 × 7 =
84
composite factor = 3 × 5 × 7 =
105
composite factor = 2
3 × 3 × 5 =
120
composite factor = 2
2 × 5 × 7 =
140
composite factor = 2 × 71 =
142
composite factor = 2
3 × 3 × 7 =
168
composite factor = 2 × 3 × 5 × 7 =
210
composite factor = 3 × 71 =
213
This list continues below...
... This list continues from above
composite factor = 2
3 × 5 × 7 =
280
composite factor = 2
2 × 71 =
284
composite factor = 5 × 71 =
355
composite factor = 2
2 × 3 × 5 × 7 =
420
composite factor = 2 × 3 × 71 =
426
composite factor = 7 × 71 =
497
composite factor = 2
3 × 71 =
568
composite factor = 2 × 5 × 71 =
710
composite factor = 2
3 × 3 × 5 × 7 =
840
composite factor = 2
2 × 3 × 71 =
852
composite factor = 2 × 7 × 71 =
994
composite factor = 3 × 5 × 71 =
1,065
composite factor = 2
2 × 5 × 71 =
1,420
composite factor = 3 × 7 × 71 =
1,491
composite factor = 2
3 × 3 × 71 =
1,704
composite factor = 2
2 × 7 × 71 =
1,988
composite factor = 2 × 3 × 5 × 71 =
2,130
composite factor = 5 × 7 × 71 =
2,485
composite factor = 2
3 × 5 × 71 =
2,840
composite factor = 2 × 3 × 7 × 71 =
2,982
composite factor = 2
3 × 7 × 71 =
3,976
composite factor = 2
2 × 3 × 5 × 71 =
4,260
composite factor = 2 × 5 × 7 × 71 =
4,970
composite factor = 2
2 × 3 × 7 × 71 =
5,964
composite factor = 3 × 5 × 7 × 71 =
7,455
composite factor = 2
3 × 3 × 5 × 71 =
8,520
composite factor = 2
2 × 5 × 7 × 71 =
9,940
composite factor = 2
3 × 3 × 7 × 71 =
11,928
composite factor = 2 × 3 × 5 × 7 × 71 =
14,910
composite factor = 2
3 × 5 × 7 × 71 =
19,880
composite factor = 2
2 × 3 × 5 × 7 × 71 =
29,820
composite factor = 2
3 × 3 × 5 × 7 × 71 =
59,640
64 factors (divisors)
What times what is 59,640?
What number multiplied by what number equals 59,640?
All the combinations of any two natural numbers whose product equals 59,640.
1 × 59,640 = 59,640
2 × 29,820 = 59,640
3 × 19,880 = 59,640
4 × 14,910 = 59,640
5 × 11,928 = 59,640
6 × 9,940 = 59,640
7 × 8,520 = 59,640
8 × 7,455 = 59,640
10 × 5,964 = 59,640
12 × 4,970 = 59,640
14 × 4,260 = 59,640
15 × 3,976 = 59,640
20 × 2,982 = 59,640
21 × 2,840 = 59,640
24 × 2,485 = 59,640
28 × 2,130 = 59,640
30 × 1,988 = 59,640
35 × 1,704 = 59,640
40 × 1,491 = 59,640
42 × 1,420 = 59,640
56 × 1,065 = 59,640
60 × 994 = 59,640
70 × 852 = 59,640
71 × 840 = 59,640
84 × 710 = 59,640
105 × 568 = 59,640
120 × 497 = 59,640
140 × 426 = 59,640
142 × 420 = 59,640
168 × 355 = 59,640
210 × 284 = 59,640
213 × 280 = 59,640
32 unique multiplications The final answer:
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