To find all the divisors of the number 875,432:
- 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 875,432:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
875,432 = 23 × 17 × 41 × 157
875,432 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) = 4 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 875,432
- 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
composite factor = 2
3 =
8
prime factor =
17
composite factor = 2 × 17 =
34
prime factor =
41
composite factor = 2
2 × 17 =
68
composite factor = 2 × 41 =
82
composite factor = 2
3 × 17 =
136
prime factor =
157
composite factor = 2
2 × 41 =
164
composite factor = 2 × 157 =
314
composite factor = 2
3 × 41 =
328
composite factor = 2
2 × 157 =
628
composite factor = 17 × 41 =
697
This list continues below...
... This list continues from above
composite factor = 2
3 × 157 =
1,256
composite factor = 2 × 17 × 41 =
1,394
composite factor = 17 × 157 =
2,669
composite factor = 2
2 × 17 × 41 =
2,788
composite factor = 2 × 17 × 157 =
5,338
composite factor = 2
3 × 17 × 41 =
5,576
composite factor = 41 × 157 =
6,437
composite factor = 2
2 × 17 × 157 =
10,676
composite factor = 2 × 41 × 157 =
12,874
composite factor = 2
3 × 17 × 157 =
21,352
composite factor = 2
2 × 41 × 157 =
25,748
composite factor = 2
3 × 41 × 157 =
51,496
composite factor = 17 × 41 × 157 =
109,429
composite factor = 2 × 17 × 41 × 157 =
218,858
composite factor = 2
2 × 17 × 41 × 157 =
437,716
composite factor = 2
3 × 17 × 41 × 157 =
875,432
32 factors (divisors)
What times what is 875,432?
What number multiplied by what number equals 875,432?
All the combinations of any two natural numbers whose product equals 875,432.
1 × 875,432 = 875,432
2 × 437,716 = 875,432
4 × 218,858 = 875,432
8 × 109,429 = 875,432
17 × 51,496 = 875,432
34 × 25,748 = 875,432
41 × 21,352 = 875,432
68 × 12,874 = 875,432
82 × 10,676 = 875,432
136 × 6,437 = 875,432
157 × 5,576 = 875,432
164 × 5,338 = 875,432
314 × 2,788 = 875,432
328 × 2,669 = 875,432
628 × 1,394 = 875,432
697 × 1,256 = 875,432
16 unique multiplications The final answer:
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