To find all the divisors of the number 250,712:
- 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 250,712:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
250,712 = 23 × 7 × 112 × 37
250,712 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 = (3 + 1) × (1 + 1) × (2 + 1) × (1 + 1) = 4 × 2 × 3 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 250,712
- 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 =
7
composite factor = 2
3 =
8
prime factor =
11
composite factor = 2 × 7 =
14
composite factor = 2 × 11 =
22
composite factor = 2
2 × 7 =
28
prime factor =
37
composite factor = 2
2 × 11 =
44
composite factor = 2
3 × 7 =
56
composite factor = 2 × 37 =
74
composite factor = 7 × 11 =
77
composite factor = 2
3 × 11 =
88
composite factor = 11
2 =
121
composite factor = 2
2 × 37 =
148
composite factor = 2 × 7 × 11 =
154
composite factor = 2 × 11
2 =
242
composite factor = 7 × 37 =
259
composite factor = 2
3 × 37 =
296
composite factor = 2
2 × 7 × 11 =
308
composite factor = 11 × 37 =
407
composite factor = 2
2 × 11
2 =
484
This list continues below...
... This list continues from above
composite factor = 2 × 7 × 37 =
518
composite factor = 2
3 × 7 × 11 =
616
composite factor = 2 × 11 × 37 =
814
composite factor = 7 × 11
2 =
847
composite factor = 2
3 × 11
2 =
968
composite factor = 2
2 × 7 × 37 =
1,036
composite factor = 2
2 × 11 × 37 =
1,628
composite factor = 2 × 7 × 11
2 =
1,694
composite factor = 2
3 × 7 × 37 =
2,072
composite factor = 7 × 11 × 37 =
2,849
composite factor = 2
3 × 11 × 37 =
3,256
composite factor = 2
2 × 7 × 11
2 =
3,388
composite factor = 11
2 × 37 =
4,477
composite factor = 2 × 7 × 11 × 37 =
5,698
composite factor = 2
3 × 7 × 11
2 =
6,776
composite factor = 2 × 11
2 × 37 =
8,954
composite factor = 2
2 × 7 × 11 × 37 =
11,396
composite factor = 2
2 × 11
2 × 37 =
17,908
composite factor = 2
3 × 7 × 11 × 37 =
22,792
composite factor = 7 × 11
2 × 37 =
31,339
composite factor = 2
3 × 11
2 × 37 =
35,816
composite factor = 2 × 7 × 11
2 × 37 =
62,678
composite factor = 2
2 × 7 × 11
2 × 37 =
125,356
composite factor = 2
3 × 7 × 11
2 × 37 =
250,712
48 factors (divisors)
What times what is 250,712?
What number multiplied by what number equals 250,712?
All the combinations of any two natural numbers whose product equals 250,712.
1 × 250,712 = 250,712
2 × 125,356 = 250,712
4 × 62,678 = 250,712
7 × 35,816 = 250,712
8 × 31,339 = 250,712
11 × 22,792 = 250,712
14 × 17,908 = 250,712
22 × 11,396 = 250,712
28 × 8,954 = 250,712
37 × 6,776 = 250,712
44 × 5,698 = 250,712
56 × 4,477 = 250,712
74 × 3,388 = 250,712
77 × 3,256 = 250,712
88 × 2,849 = 250,712
121 × 2,072 = 250,712
148 × 1,694 = 250,712
154 × 1,628 = 250,712
242 × 1,036 = 250,712
259 × 968 = 250,712
296 × 847 = 250,712
308 × 814 = 250,712
407 × 616 = 250,712
484 × 518 = 250,712
24 unique multiplications The final answer:
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