To find all the divisors of the number 988,997,412:
- 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 988,997,412:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
988,997,412 = 22 × 3 × 13 × 59 × 107,453
988,997,412 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) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 988,997,412
- 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
2 =
4
composite factor = 2 × 3 =
6
composite factor = 2
2 × 3 =
12
prime factor =
13
composite factor = 2 × 13 =
26
composite factor = 3 × 13 =
39
composite factor = 2
2 × 13 =
52
prime factor =
59
composite factor = 2 × 3 × 13 =
78
composite factor = 2 × 59 =
118
composite factor = 2
2 × 3 × 13 =
156
composite factor = 3 × 59 =
177
composite factor = 2
2 × 59 =
236
composite factor = 2 × 3 × 59 =
354
composite factor = 2
2 × 3 × 59 =
708
composite factor = 13 × 59 =
767
composite factor = 2 × 13 × 59 =
1,534
composite factor = 3 × 13 × 59 =
2,301
composite factor = 2
2 × 13 × 59 =
3,068
composite factor = 2 × 3 × 13 × 59 =
4,602
composite factor = 2
2 × 3 × 13 × 59 =
9,204
This list continues below...
... This list continues from above
prime factor =
107,453
composite factor = 2 × 107,453 =
214,906
composite factor = 3 × 107,453 =
322,359
composite factor = 2
2 × 107,453 =
429,812
composite factor = 2 × 3 × 107,453 =
644,718
composite factor = 2
2 × 3 × 107,453 =
1,289,436
composite factor = 13 × 107,453 =
1,396,889
composite factor = 2 × 13 × 107,453 =
2,793,778
composite factor = 3 × 13 × 107,453 =
4,190,667
composite factor = 2
2 × 13 × 107,453 =
5,587,556
composite factor = 59 × 107,453 =
6,339,727
composite factor = 2 × 3 × 13 × 107,453 =
8,381,334
composite factor = 2 × 59 × 107,453 =
12,679,454
composite factor = 2
2 × 3 × 13 × 107,453 =
16,762,668
composite factor = 3 × 59 × 107,453 =
19,019,181
composite factor = 2
2 × 59 × 107,453 =
25,358,908
composite factor = 2 × 3 × 59 × 107,453 =
38,038,362
composite factor = 2
2 × 3 × 59 × 107,453 =
76,076,724
composite factor = 13 × 59 × 107,453 =
82,416,451
composite factor = 2 × 13 × 59 × 107,453 =
164,832,902
composite factor = 3 × 13 × 59 × 107,453 =
247,249,353
composite factor = 2
2 × 13 × 59 × 107,453 =
329,665,804
composite factor = 2 × 3 × 13 × 59 × 107,453 =
494,498,706
composite factor = 2
2 × 3 × 13 × 59 × 107,453 =
988,997,412
48 factors (divisors)
What times what is 988,997,412?
What number multiplied by what number equals 988,997,412?
All the combinations of any two natural numbers whose product equals 988,997,412.
1 × 988,997,412 = 988,997,412
2 × 494,498,706 = 988,997,412
3 × 329,665,804 = 988,997,412
4 × 247,249,353 = 988,997,412
6 × 164,832,902 = 988,997,412
12 × 82,416,451 = 988,997,412
13 × 76,076,724 = 988,997,412
26 × 38,038,362 = 988,997,412
39 × 25,358,908 = 988,997,412
52 × 19,019,181 = 988,997,412
59 × 16,762,668 = 988,997,412
78 × 12,679,454 = 988,997,412
118 × 8,381,334 = 988,997,412
156 × 6,339,727 = 988,997,412
177 × 5,587,556 = 988,997,412
236 × 4,190,667 = 988,997,412
354 × 2,793,778 = 988,997,412
708 × 1,396,889 = 988,997,412
767 × 1,289,436 = 988,997,412
1,534 × 644,718 = 988,997,412
2,301 × 429,812 = 988,997,412
3,068 × 322,359 = 988,997,412
4,602 × 214,906 = 988,997,412
9,204 × 107,453 = 988,997,412
24 unique multiplications The final answer:
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