To find all the divisors of the number 87,500,012:
- 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 87,500,012:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
87,500,012 = 22 × 43 × 211 × 2,411
87,500,012 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) = 3 × 2 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 87,500,012
- 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
composite factor = 2
2 =
4
prime factor =
43
composite factor = 2 × 43 =
86
composite factor = 2
2 × 43 =
172
prime factor =
211
composite factor = 2 × 211 =
422
composite factor = 2
2 × 211 =
844
prime factor =
2,411
composite factor = 2 × 2,411 =
4,822
composite factor = 43 × 211 =
9,073
This list continues below...
... This list continues from above
composite factor = 2
2 × 2,411 =
9,644
composite factor = 2 × 43 × 211 =
18,146
composite factor = 2
2 × 43 × 211 =
36,292
composite factor = 43 × 2,411 =
103,673
composite factor = 2 × 43 × 2,411 =
207,346
composite factor = 2
2 × 43 × 2,411 =
414,692
composite factor = 211 × 2,411 =
508,721
composite factor = 2 × 211 × 2,411 =
1,017,442
composite factor = 2
2 × 211 × 2,411 =
2,034,884
composite factor = 43 × 211 × 2,411 =
21,875,003
composite factor = 2 × 43 × 211 × 2,411 =
43,750,006
composite factor = 2
2 × 43 × 211 × 2,411 =
87,500,012
24 factors (divisors)
What times what is 87,500,012?
What number multiplied by what number equals 87,500,012?
All the combinations of any two natural numbers whose product equals 87,500,012.
1 × 87,500,012 = 87,500,012
2 × 43,750,006 = 87,500,012
4 × 21,875,003 = 87,500,012
43 × 2,034,884 = 87,500,012
86 × 1,017,442 = 87,500,012
172 × 508,721 = 87,500,012
211 × 414,692 = 87,500,012
422 × 207,346 = 87,500,012
844 × 103,673 = 87,500,012
2,411 × 36,292 = 87,500,012
4,822 × 18,146 = 87,500,012
9,073 × 9,644 = 87,500,012
12 unique multiplications The final answer:
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