To find all the divisors of the number 130,758:
- 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 130,758:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
130,758 = 2 × 3 × 19 × 31 × 37
130,758 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 130,758
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 × 3 =
6
prime factor =
19
prime factor =
31
prime factor =
37
composite factor = 2 × 19 =
38
composite factor = 3 × 19 =
57
composite factor = 2 × 31 =
62
composite factor = 2 × 37 =
74
composite factor = 3 × 31 =
93
composite factor = 3 × 37 =
111
composite factor = 2 × 3 × 19 =
114
composite factor = 2 × 3 × 31 =
186
composite factor = 2 × 3 × 37 =
222
This list continues below...
... This list continues from above
composite factor = 19 × 31 =
589
composite factor = 19 × 37 =
703
composite factor = 31 × 37 =
1,147
composite factor = 2 × 19 × 31 =
1,178
composite factor = 2 × 19 × 37 =
1,406
composite factor = 3 × 19 × 31 =
1,767
composite factor = 3 × 19 × 37 =
2,109
composite factor = 2 × 31 × 37 =
2,294
composite factor = 3 × 31 × 37 =
3,441
composite factor = 2 × 3 × 19 × 31 =
3,534
composite factor = 2 × 3 × 19 × 37 =
4,218
composite factor = 2 × 3 × 31 × 37 =
6,882
composite factor = 19 × 31 × 37 =
21,793
composite factor = 2 × 19 × 31 × 37 =
43,586
composite factor = 3 × 19 × 31 × 37 =
65,379
composite factor = 2 × 3 × 19 × 31 × 37 =
130,758
32 factors (divisors)
What times what is 130,758?
What number multiplied by what number equals 130,758?
All the combinations of any two natural numbers whose product equals 130,758.
1 × 130,758 = 130,758
2 × 65,379 = 130,758
3 × 43,586 = 130,758
6 × 21,793 = 130,758
19 × 6,882 = 130,758
31 × 4,218 = 130,758
37 × 3,534 = 130,758
38 × 3,441 = 130,758
57 × 2,294 = 130,758
62 × 2,109 = 130,758
74 × 1,767 = 130,758
93 × 1,406 = 130,758
111 × 1,178 = 130,758
114 × 1,147 = 130,758
186 × 703 = 130,758
222 × 589 = 130,758
16 unique multiplications The final answer:
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