To find all the divisors of the number 931,872:
- 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 931,872:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
931,872 = 25 × 3 × 17 × 571
931,872 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 = (5 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 6 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 931,872
- 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
composite factor = 2 × 3 =
6
composite factor = 2
3 =
8
composite factor = 2
2 × 3 =
12
composite factor = 2
4 =
16
prime factor =
17
composite factor = 2
3 × 3 =
24
composite factor = 2
5 =
32
composite factor = 2 × 17 =
34
composite factor = 2
4 × 3 =
48
composite factor = 3 × 17 =
51
composite factor = 2
2 × 17 =
68
composite factor = 2
5 × 3 =
96
composite factor = 2 × 3 × 17 =
102
composite factor = 2
3 × 17 =
136
composite factor = 2
2 × 3 × 17 =
204
composite factor = 2
4 × 17 =
272
composite factor = 2
3 × 3 × 17 =
408
composite factor = 2
5 × 17 =
544
prime factor =
571
composite factor = 2
4 × 3 × 17 =
816
This list continues below...
... This list continues from above
composite factor = 2 × 571 =
1,142
composite factor = 2
5 × 3 × 17 =
1,632
composite factor = 3 × 571 =
1,713
composite factor = 2
2 × 571 =
2,284
composite factor = 2 × 3 × 571 =
3,426
composite factor = 2
3 × 571 =
4,568
composite factor = 2
2 × 3 × 571 =
6,852
composite factor = 2
4 × 571 =
9,136
composite factor = 17 × 571 =
9,707
composite factor = 2
3 × 3 × 571 =
13,704
composite factor = 2
5 × 571 =
18,272
composite factor = 2 × 17 × 571 =
19,414
composite factor = 2
4 × 3 × 571 =
27,408
composite factor = 3 × 17 × 571 =
29,121
composite factor = 2
2 × 17 × 571 =
38,828
composite factor = 2
5 × 3 × 571 =
54,816
composite factor = 2 × 3 × 17 × 571 =
58,242
composite factor = 2
3 × 17 × 571 =
77,656
composite factor = 2
2 × 3 × 17 × 571 =
116,484
composite factor = 2
4 × 17 × 571 =
155,312
composite factor = 2
3 × 3 × 17 × 571 =
232,968
composite factor = 2
5 × 17 × 571 =
310,624
composite factor = 2
4 × 3 × 17 × 571 =
465,936
composite factor = 2
5 × 3 × 17 × 571 =
931,872
48 factors (divisors)
What times what is 931,872?
What number multiplied by what number equals 931,872?
All the combinations of any two natural numbers whose product equals 931,872.
1 × 931,872 = 931,872
2 × 465,936 = 931,872
3 × 310,624 = 931,872
4 × 232,968 = 931,872
6 × 155,312 = 931,872
8 × 116,484 = 931,872
12 × 77,656 = 931,872
16 × 58,242 = 931,872
17 × 54,816 = 931,872
24 × 38,828 = 931,872
32 × 29,121 = 931,872
34 × 27,408 = 931,872
48 × 19,414 = 931,872
51 × 18,272 = 931,872
68 × 13,704 = 931,872
96 × 9,707 = 931,872
102 × 9,136 = 931,872
136 × 6,852 = 931,872
204 × 4,568 = 931,872
272 × 3,426 = 931,872
408 × 2,284 = 931,872
544 × 1,713 = 931,872
571 × 1,632 = 931,872
816 × 1,142 = 931,872
24 unique multiplications The final answer:
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