To find all the divisors of the number 78,792:
- 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 78,792:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
78,792 = 23 × 3 × 72 × 67
78,792 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 78,792
- 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
composite factor = 2
2 × 3 =
12
composite factor = 2 × 7 =
14
composite factor = 3 × 7 =
21
composite factor = 2
3 × 3 =
24
composite factor = 2
2 × 7 =
28
composite factor = 2 × 3 × 7 =
42
composite factor = 7
2 =
49
composite factor = 2
3 × 7 =
56
prime factor =
67
composite factor = 2
2 × 3 × 7 =
84
composite factor = 2 × 7
2 =
98
composite factor = 2 × 67 =
134
composite factor = 3 × 7
2 =
147
composite factor = 2
3 × 3 × 7 =
168
composite factor = 2
2 × 7
2 =
196
composite factor = 3 × 67 =
201
composite factor = 2
2 × 67 =
268
This list continues below...
... This list continues from above
composite factor = 2 × 3 × 7
2 =
294
composite factor = 2
3 × 7
2 =
392
composite factor = 2 × 3 × 67 =
402
composite factor = 7 × 67 =
469
composite factor = 2
3 × 67 =
536
composite factor = 2
2 × 3 × 7
2 =
588
composite factor = 2
2 × 3 × 67 =
804
composite factor = 2 × 7 × 67 =
938
composite factor = 2
3 × 3 × 7
2 =
1,176
composite factor = 3 × 7 × 67 =
1,407
composite factor = 2
3 × 3 × 67 =
1,608
composite factor = 2
2 × 7 × 67 =
1,876
composite factor = 2 × 3 × 7 × 67 =
2,814
composite factor = 7
2 × 67 =
3,283
composite factor = 2
3 × 7 × 67 =
3,752
composite factor = 2
2 × 3 × 7 × 67 =
5,628
composite factor = 2 × 7
2 × 67 =
6,566
composite factor = 3 × 7
2 × 67 =
9,849
composite factor = 2
3 × 3 × 7 × 67 =
11,256
composite factor = 2
2 × 7
2 × 67 =
13,132
composite factor = 2 × 3 × 7
2 × 67 =
19,698
composite factor = 2
3 × 7
2 × 67 =
26,264
composite factor = 2
2 × 3 × 7
2 × 67 =
39,396
composite factor = 2
3 × 3 × 7
2 × 67 =
78,792
48 factors (divisors)
What times what is 78,792?
What number multiplied by what number equals 78,792?
All the combinations of any two natural numbers whose product equals 78,792.
1 × 78,792 = 78,792
2 × 39,396 = 78,792
3 × 26,264 = 78,792
4 × 19,698 = 78,792
6 × 13,132 = 78,792
7 × 11,256 = 78,792
8 × 9,849 = 78,792
12 × 6,566 = 78,792
14 × 5,628 = 78,792
21 × 3,752 = 78,792
24 × 3,283 = 78,792
28 × 2,814 = 78,792
42 × 1,876 = 78,792
49 × 1,608 = 78,792
56 × 1,407 = 78,792
67 × 1,176 = 78,792
84 × 938 = 78,792
98 × 804 = 78,792
134 × 588 = 78,792
147 × 536 = 78,792
168 × 469 = 78,792
196 × 402 = 78,792
201 × 392 = 78,792
268 × 294 = 78,792
24 unique multiplications The final answer:
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