To find all the divisors of the number 17,128,422:
- 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 17,128,422:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
17,128,422 = 2 × 34 × 23 × 4,597
17,128,422 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) × (4 + 1) × (1 + 1) × (1 + 1) = 2 × 5 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 17,128,422
- 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 × 3 =
6
composite factor = 3
2 =
9
composite factor = 2 × 3
2 =
18
prime factor =
23
composite factor = 3
3 =
27
composite factor = 2 × 23 =
46
composite factor = 2 × 3
3 =
54
composite factor = 3 × 23 =
69
composite factor = 3
4 =
81
composite factor = 2 × 3 × 23 =
138
composite factor = 2 × 3
4 =
162
composite factor = 3
2 × 23 =
207
composite factor = 2 × 3
2 × 23 =
414
composite factor = 3
3 × 23 =
621
composite factor = 2 × 3
3 × 23 =
1,242
composite factor = 3
4 × 23 =
1,863
composite factor = 2 × 3
4 × 23 =
3,726
This list continues below...
... This list continues from above
prime factor =
4,597
composite factor = 2 × 4,597 =
9,194
composite factor = 3 × 4,597 =
13,791
composite factor = 2 × 3 × 4,597 =
27,582
composite factor = 3
2 × 4,597 =
41,373
composite factor = 2 × 3
2 × 4,597 =
82,746
composite factor = 23 × 4,597 =
105,731
composite factor = 3
3 × 4,597 =
124,119
composite factor = 2 × 23 × 4,597 =
211,462
composite factor = 2 × 3
3 × 4,597 =
248,238
composite factor = 3 × 23 × 4,597 =
317,193
composite factor = 3
4 × 4,597 =
372,357
composite factor = 2 × 3 × 23 × 4,597 =
634,386
composite factor = 2 × 3
4 × 4,597 =
744,714
composite factor = 3
2 × 23 × 4,597 =
951,579
composite factor = 2 × 3
2 × 23 × 4,597 =
1,903,158
composite factor = 3
3 × 23 × 4,597 =
2,854,737
composite factor = 2 × 3
3 × 23 × 4,597 =
5,709,474
composite factor = 3
4 × 23 × 4,597 =
8,564,211
composite factor = 2 × 3
4 × 23 × 4,597 =
17,128,422
40 factors (divisors)
What times what is 17,128,422?
What number multiplied by what number equals 17,128,422?
All the combinations of any two natural numbers whose product equals 17,128,422.
1 × 17,128,422 = 17,128,422
2 × 8,564,211 = 17,128,422
3 × 5,709,474 = 17,128,422
6 × 2,854,737 = 17,128,422
9 × 1,903,158 = 17,128,422
18 × 951,579 = 17,128,422
23 × 744,714 = 17,128,422
27 × 634,386 = 17,128,422
46 × 372,357 = 17,128,422
54 × 317,193 = 17,128,422
69 × 248,238 = 17,128,422
81 × 211,462 = 17,128,422
138 × 124,119 = 17,128,422
162 × 105,731 = 17,128,422
207 × 82,746 = 17,128,422
414 × 41,373 = 17,128,422
621 × 27,582 = 17,128,422
1,242 × 13,791 = 17,128,422
1,863 × 9,194 = 17,128,422
3,726 × 4,597 = 17,128,422
20 unique multiplications The final answer:
(scroll down)