To find all the divisors of the number 32,085:
- 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 32,085:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
32,085 = 32 × 5 × 23 × 31
32,085 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) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 32,085
- 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 =
3
prime factor =
5
composite factor = 3
2 =
9
composite factor = 3 × 5 =
15
prime factor =
23
prime factor =
31
composite factor = 3
2 × 5 =
45
composite factor = 3 × 23 =
69
composite factor = 3 × 31 =
93
composite factor = 5 × 23 =
115
composite factor = 5 × 31 =
155
This list continues below...
... This list continues from above
composite factor = 3
2 × 23 =
207
composite factor = 3
2 × 31 =
279
composite factor = 3 × 5 × 23 =
345
composite factor = 3 × 5 × 31 =
465
composite factor = 23 × 31 =
713
composite factor = 3
2 × 5 × 23 =
1,035
composite factor = 3
2 × 5 × 31 =
1,395
composite factor = 3 × 23 × 31 =
2,139
composite factor = 5 × 23 × 31 =
3,565
composite factor = 3
2 × 23 × 31 =
6,417
composite factor = 3 × 5 × 23 × 31 =
10,695
composite factor = 3
2 × 5 × 23 × 31 =
32,085
24 factors (divisors)
What times what is 32,085?
What number multiplied by what number equals 32,085?
All the combinations of any two natural numbers whose product equals 32,085.
1 × 32,085 = 32,085
3 × 10,695 = 32,085
5 × 6,417 = 32,085
9 × 3,565 = 32,085
15 × 2,139 = 32,085
23 × 1,395 = 32,085
31 × 1,035 = 32,085
45 × 713 = 32,085
69 × 465 = 32,085
93 × 345 = 32,085
115 × 279 = 32,085
155 × 207 = 32,085
12 unique multiplications The final answer:
(scroll down)