To find all the divisors of the number 856,418,750:
- 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 856,418,750:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
856,418,750 = 2 × 55 × 11 × 12,457
856,418,750 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) × (5 + 1) × (1 + 1) × (1 + 1) = 2 × 6 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 856,418,750
- 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 =
5
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2 × 11 =
22
composite factor = 5
2 =
25
composite factor = 2 × 5
2 =
50
composite factor = 5 × 11 =
55
composite factor = 2 × 5 × 11 =
110
composite factor = 5
3 =
125
composite factor = 2 × 5
3 =
250
composite factor = 5
2 × 11 =
275
composite factor = 2 × 5
2 × 11 =
550
composite factor = 5
4 =
625
composite factor = 2 × 5
4 =
1,250
composite factor = 5
3 × 11 =
1,375
composite factor = 2 × 5
3 × 11 =
2,750
composite factor = 5
5 =
3,125
composite factor = 2 × 5
5 =
6,250
composite factor = 5
4 × 11 =
6,875
prime factor =
12,457
composite factor = 2 × 5
4 × 11 =
13,750
composite factor = 2 × 12,457 =
24,914
This list continues below...
... This list continues from above
composite factor = 5
5 × 11 =
34,375
composite factor = 5 × 12,457 =
62,285
composite factor = 2 × 5
5 × 11 =
68,750
composite factor = 2 × 5 × 12,457 =
124,570
composite factor = 11 × 12,457 =
137,027
composite factor = 2 × 11 × 12,457 =
274,054
composite factor = 5
2 × 12,457 =
311,425
composite factor = 2 × 5
2 × 12,457 =
622,850
composite factor = 5 × 11 × 12,457 =
685,135
composite factor = 2 × 5 × 11 × 12,457 =
1,370,270
composite factor = 5
3 × 12,457 =
1,557,125
composite factor = 2 × 5
3 × 12,457 =
3,114,250
composite factor = 5
2 × 11 × 12,457 =
3,425,675
composite factor = 2 × 5
2 × 11 × 12,457 =
6,851,350
composite factor = 5
4 × 12,457 =
7,785,625
composite factor = 2 × 5
4 × 12,457 =
15,571,250
composite factor = 5
3 × 11 × 12,457 =
17,128,375
composite factor = 2 × 5
3 × 11 × 12,457 =
34,256,750
composite factor = 5
5 × 12,457 =
38,928,125
composite factor = 2 × 5
5 × 12,457 =
77,856,250
composite factor = 5
4 × 11 × 12,457 =
85,641,875
composite factor = 2 × 5
4 × 11 × 12,457 =
171,283,750
composite factor = 5
5 × 11 × 12,457 =
428,209,375
composite factor = 2 × 5
5 × 11 × 12,457 =
856,418,750
48 factors (divisors)
What times what is 856,418,750?
What number multiplied by what number equals 856,418,750?
All the combinations of any two natural numbers whose product equals 856,418,750.
1 × 856,418,750 = 856,418,750
2 × 428,209,375 = 856,418,750
5 × 171,283,750 = 856,418,750
10 × 85,641,875 = 856,418,750
11 × 77,856,250 = 856,418,750
22 × 38,928,125 = 856,418,750
25 × 34,256,750 = 856,418,750
50 × 17,128,375 = 856,418,750
55 × 15,571,250 = 856,418,750
110 × 7,785,625 = 856,418,750
125 × 6,851,350 = 856,418,750
250 × 3,425,675 = 856,418,750
275 × 3,114,250 = 856,418,750
550 × 1,557,125 = 856,418,750
625 × 1,370,270 = 856,418,750
1,250 × 685,135 = 856,418,750
1,375 × 622,850 = 856,418,750
2,750 × 311,425 = 856,418,750
3,125 × 274,054 = 856,418,750
6,250 × 137,027 = 856,418,750
6,875 × 124,570 = 856,418,750
12,457 × 68,750 = 856,418,750
13,750 × 62,285 = 856,418,750
24,914 × 34,375 = 856,418,750
24 unique multiplications The final answer:
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