To find all the divisors of the number 7,900,000,017:
- 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 7,900,000,017:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
7,900,000,017 = 3 × 7 × 13 × 61 × 474,389
7,900,000,017 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 7,900,000,017
- 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 =
3
prime factor =
7
prime factor =
13
composite factor = 3 × 7 =
21
composite factor = 3 × 13 =
39
prime factor =
61
composite factor = 7 × 13 =
91
composite factor = 3 × 61 =
183
composite factor = 3 × 7 × 13 =
273
composite factor = 7 × 61 =
427
composite factor = 13 × 61 =
793
composite factor = 3 × 7 × 61 =
1,281
composite factor = 3 × 13 × 61 =
2,379
composite factor = 7 × 13 × 61 =
5,551
composite factor = 3 × 7 × 13 × 61 =
16,653
This list continues below...
... This list continues from above
prime factor =
474,389
composite factor = 3 × 474,389 =
1,423,167
composite factor = 7 × 474,389 =
3,320,723
composite factor = 13 × 474,389 =
6,167,057
composite factor = 3 × 7 × 474,389 =
9,962,169
composite factor = 3 × 13 × 474,389 =
18,501,171
composite factor = 61 × 474,389 =
28,937,729
composite factor = 7 × 13 × 474,389 =
43,169,399
composite factor = 3 × 61 × 474,389 =
86,813,187
composite factor = 3 × 7 × 13 × 474,389 =
129,508,197
composite factor = 7 × 61 × 474,389 =
202,564,103
composite factor = 13 × 61 × 474,389 =
376,190,477
composite factor = 3 × 7 × 61 × 474,389 =
607,692,309
composite factor = 3 × 13 × 61 × 474,389 =
1,128,571,431
composite factor = 7 × 13 × 61 × 474,389 =
2,633,333,339
composite factor = 3 × 7 × 13 × 61 × 474,389 =
7,900,000,017
32 factors (divisors)
What times what is 7,900,000,017?
What number multiplied by what number equals 7,900,000,017?
All the combinations of any two natural numbers whose product equals 7,900,000,017.
1 × 7,900,000,017 = 7,900,000,017
3 × 2,633,333,339 = 7,900,000,017
7 × 1,128,571,431 = 7,900,000,017
13 × 607,692,309 = 7,900,000,017
21 × 376,190,477 = 7,900,000,017
39 × 202,564,103 = 7,900,000,017
61 × 129,508,197 = 7,900,000,017
91 × 86,813,187 = 7,900,000,017
183 × 43,169,399 = 7,900,000,017
273 × 28,937,729 = 7,900,000,017
427 × 18,501,171 = 7,900,000,017
793 × 9,962,169 = 7,900,000,017
1,281 × 6,167,057 = 7,900,000,017
2,379 × 3,320,723 = 7,900,000,017
5,551 × 1,423,167 = 7,900,000,017
16,653 × 474,389 = 7,900,000,017
16 unique multiplications The final answer:
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