To find all the divisors of the number 76,912:
- 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 76,912:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
76,912 = 24 × 11 × 19 × 23
76,912 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 = (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 2 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 76,912
- 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
composite factor = 2
3 =
8
prime factor =
11
composite factor = 2
4 =
16
prime factor =
19
composite factor = 2 × 11 =
22
prime factor =
23
composite factor = 2 × 19 =
38
composite factor = 2
2 × 11 =
44
composite factor = 2 × 23 =
46
composite factor = 2
2 × 19 =
76
composite factor = 2
3 × 11 =
88
composite factor = 2
2 × 23 =
92
composite factor = 2
3 × 19 =
152
composite factor = 2
4 × 11 =
176
composite factor = 2
3 × 23 =
184
composite factor = 11 × 19 =
209
composite factor = 11 × 23 =
253
This list continues below...
... This list continues from above
composite factor = 2
4 × 19 =
304
composite factor = 2
4 × 23 =
368
composite factor = 2 × 11 × 19 =
418
composite factor = 19 × 23 =
437
composite factor = 2 × 11 × 23 =
506
composite factor = 2
2 × 11 × 19 =
836
composite factor = 2 × 19 × 23 =
874
composite factor = 2
2 × 11 × 23 =
1,012
composite factor = 2
3 × 11 × 19 =
1,672
composite factor = 2
2 × 19 × 23 =
1,748
composite factor = 2
3 × 11 × 23 =
2,024
composite factor = 2
4 × 11 × 19 =
3,344
composite factor = 2
3 × 19 × 23 =
3,496
composite factor = 2
4 × 11 × 23 =
4,048
composite factor = 11 × 19 × 23 =
4,807
composite factor = 2
4 × 19 × 23 =
6,992
composite factor = 2 × 11 × 19 × 23 =
9,614
composite factor = 2
2 × 11 × 19 × 23 =
19,228
composite factor = 2
3 × 11 × 19 × 23 =
38,456
composite factor = 2
4 × 11 × 19 × 23 =
76,912
40 factors (divisors)
What times what is 76,912?
What number multiplied by what number equals 76,912?
All the combinations of any two natural numbers whose product equals 76,912.
1 × 76,912 = 76,912
2 × 38,456 = 76,912
4 × 19,228 = 76,912
8 × 9,614 = 76,912
11 × 6,992 = 76,912
16 × 4,807 = 76,912
19 × 4,048 = 76,912
22 × 3,496 = 76,912
23 × 3,344 = 76,912
38 × 2,024 = 76,912
44 × 1,748 = 76,912
46 × 1,672 = 76,912
76 × 1,012 = 76,912
88 × 874 = 76,912
92 × 836 = 76,912
152 × 506 = 76,912
176 × 437 = 76,912
184 × 418 = 76,912
209 × 368 = 76,912
253 × 304 = 76,912
20 unique multiplications The final answer:
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