To find all the divisors of the number 79,926:
- 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 79,926:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
79,926 = 2 × 3 × 7 × 11 × 173
79,926 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 79,926
- 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 =
7
prime factor =
11
composite factor = 2 × 7 =
14
composite factor = 3 × 7 =
21
composite factor = 2 × 11 =
22
composite factor = 3 × 11 =
33
composite factor = 2 × 3 × 7 =
42
composite factor = 2 × 3 × 11 =
66
composite factor = 7 × 11 =
77
composite factor = 2 × 7 × 11 =
154
prime factor =
173
composite factor = 3 × 7 × 11 =
231
This list continues below...
... This list continues from above
composite factor = 2 × 173 =
346
composite factor = 2 × 3 × 7 × 11 =
462
composite factor = 3 × 173 =
519
composite factor = 2 × 3 × 173 =
1,038
composite factor = 7 × 173 =
1,211
composite factor = 11 × 173 =
1,903
composite factor = 2 × 7 × 173 =
2,422
composite factor = 3 × 7 × 173 =
3,633
composite factor = 2 × 11 × 173 =
3,806
composite factor = 3 × 11 × 173 =
5,709
composite factor = 2 × 3 × 7 × 173 =
7,266
composite factor = 2 × 3 × 11 × 173 =
11,418
composite factor = 7 × 11 × 173 =
13,321
composite factor = 2 × 7 × 11 × 173 =
26,642
composite factor = 3 × 7 × 11 × 173 =
39,963
composite factor = 2 × 3 × 7 × 11 × 173 =
79,926
32 factors (divisors)
What times what is 79,926?
What number multiplied by what number equals 79,926?
All the combinations of any two natural numbers whose product equals 79,926.
1 × 79,926 = 79,926
2 × 39,963 = 79,926
3 × 26,642 = 79,926
6 × 13,321 = 79,926
7 × 11,418 = 79,926
11 × 7,266 = 79,926
14 × 5,709 = 79,926
21 × 3,806 = 79,926
22 × 3,633 = 79,926
33 × 2,422 = 79,926
42 × 1,903 = 79,926
66 × 1,211 = 79,926
77 × 1,038 = 79,926
154 × 519 = 79,926
173 × 462 = 79,926
231 × 346 = 79,926
16 unique multiplications The final answer:
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