To find all the divisors of the number 112,728:
- 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 112,728:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
112,728 = 23 × 3 × 7 × 11 × 61
112,728 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) × (1 + 1) × (1 + 1) × (1 + 1) = 4 × 2 × 2 × 2 × 2 = 64
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 112,728
- 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
prime factor =
7
composite factor = 2
3 =
8
prime factor =
11
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 3 × 7 =
21
composite factor = 2 × 11 =
22
composite factor = 2
3 × 3 =
24
composite factor = 2
2 × 7 =
28
composite factor = 3 × 11 =
33
composite factor = 2 × 3 × 7 =
42
composite factor = 2
2 × 11 =
44
composite factor = 2
3 × 7 =
56
prime factor =
61
composite factor = 2 × 3 × 11 =
66
composite factor = 7 × 11 =
77
composite factor = 2
2 × 3 × 7 =
84
composite factor = 2
3 × 11 =
88
composite factor = 2 × 61 =
122
composite factor = 2
2 × 3 × 11 =
132
composite factor = 2 × 7 × 11 =
154
composite factor = 2
3 × 3 × 7 =
168
composite factor = 3 × 61 =
183
composite factor = 3 × 7 × 11 =
231
composite factor = 2
2 × 61 =
244
composite factor = 2
3 × 3 × 11 =
264
composite factor = 2
2 × 7 × 11 =
308
This list continues below...
... This list continues from above
composite factor = 2 × 3 × 61 =
366
composite factor = 7 × 61 =
427
composite factor = 2 × 3 × 7 × 11 =
462
composite factor = 2
3 × 61 =
488
composite factor = 2
3 × 7 × 11 =
616
composite factor = 11 × 61 =
671
composite factor = 2
2 × 3 × 61 =
732
composite factor = 2 × 7 × 61 =
854
composite factor = 2
2 × 3 × 7 × 11 =
924
composite factor = 3 × 7 × 61 =
1,281
composite factor = 2 × 11 × 61 =
1,342
composite factor = 2
3 × 3 × 61 =
1,464
composite factor = 2
2 × 7 × 61 =
1,708
composite factor = 2
3 × 3 × 7 × 11 =
1,848
composite factor = 3 × 11 × 61 =
2,013
composite factor = 2 × 3 × 7 × 61 =
2,562
composite factor = 2
2 × 11 × 61 =
2,684
composite factor = 2
3 × 7 × 61 =
3,416
composite factor = 2 × 3 × 11 × 61 =
4,026
composite factor = 7 × 11 × 61 =
4,697
composite factor = 2
2 × 3 × 7 × 61 =
5,124
composite factor = 2
3 × 11 × 61 =
5,368
composite factor = 2
2 × 3 × 11 × 61 =
8,052
composite factor = 2 × 7 × 11 × 61 =
9,394
composite factor = 2
3 × 3 × 7 × 61 =
10,248
composite factor = 3 × 7 × 11 × 61 =
14,091
composite factor = 2
3 × 3 × 11 × 61 =
16,104
composite factor = 2
2 × 7 × 11 × 61 =
18,788
composite factor = 2 × 3 × 7 × 11 × 61 =
28,182
composite factor = 2
3 × 7 × 11 × 61 =
37,576
composite factor = 2
2 × 3 × 7 × 11 × 61 =
56,364
composite factor = 2
3 × 3 × 7 × 11 × 61 =
112,728
64 factors (divisors)
What times what is 112,728?
What number multiplied by what number equals 112,728?
All the combinations of any two natural numbers whose product equals 112,728.
1 × 112,728 = 112,728
2 × 56,364 = 112,728
3 × 37,576 = 112,728
4 × 28,182 = 112,728
6 × 18,788 = 112,728
7 × 16,104 = 112,728
8 × 14,091 = 112,728
11 × 10,248 = 112,728
12 × 9,394 = 112,728
14 × 8,052 = 112,728
21 × 5,368 = 112,728
22 × 5,124 = 112,728
24 × 4,697 = 112,728
28 × 4,026 = 112,728
33 × 3,416 = 112,728
42 × 2,684 = 112,728
44 × 2,562 = 112,728
56 × 2,013 = 112,728
61 × 1,848 = 112,728
66 × 1,708 = 112,728
77 × 1,464 = 112,728
84 × 1,342 = 112,728
88 × 1,281 = 112,728
122 × 924 = 112,728
132 × 854 = 112,728
154 × 732 = 112,728
168 × 671 = 112,728
183 × 616 = 112,728
231 × 488 = 112,728
244 × 462 = 112,728
264 × 427 = 112,728
308 × 366 = 112,728
32 unique multiplications The final answer:
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