To find all the divisors of the number 74,412:
- 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 74,412:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
74,412 = 22 × 33 × 13 × 53
74,412 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 = (2 + 1) × (3 + 1) × (1 + 1) × (1 + 1) = 3 × 4 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 74,412
- 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
composite factor = 3
2 =
9
composite factor = 2
2 × 3 =
12
prime factor =
13
composite factor = 2 × 3
2 =
18
composite factor = 2 × 13 =
26
composite factor = 3
3 =
27
composite factor = 2
2 × 3
2 =
36
composite factor = 3 × 13 =
39
composite factor = 2
2 × 13 =
52
prime factor =
53
composite factor = 2 × 3
3 =
54
composite factor = 2 × 3 × 13 =
78
composite factor = 2 × 53 =
106
composite factor = 2
2 × 3
3 =
108
composite factor = 3
2 × 13 =
117
composite factor = 2
2 × 3 × 13 =
156
composite factor = 3 × 53 =
159
composite factor = 2
2 × 53 =
212
composite factor = 2 × 3
2 × 13 =
234
This list continues below...
... This list continues from above
composite factor = 2 × 3 × 53 =
318
composite factor = 3
3 × 13 =
351
composite factor = 2
2 × 3
2 × 13 =
468
composite factor = 3
2 × 53 =
477
composite factor = 2
2 × 3 × 53 =
636
composite factor = 13 × 53 =
689
composite factor = 2 × 3
3 × 13 =
702
composite factor = 2 × 3
2 × 53 =
954
composite factor = 2 × 13 × 53 =
1,378
composite factor = 2
2 × 3
3 × 13 =
1,404
composite factor = 3
3 × 53 =
1,431
composite factor = 2
2 × 3
2 × 53 =
1,908
composite factor = 3 × 13 × 53 =
2,067
composite factor = 2
2 × 13 × 53 =
2,756
composite factor = 2 × 3
3 × 53 =
2,862
composite factor = 2 × 3 × 13 × 53 =
4,134
composite factor = 2
2 × 3
3 × 53 =
5,724
composite factor = 3
2 × 13 × 53 =
6,201
composite factor = 2
2 × 3 × 13 × 53 =
8,268
composite factor = 2 × 3
2 × 13 × 53 =
12,402
composite factor = 3
3 × 13 × 53 =
18,603
composite factor = 2
2 × 3
2 × 13 × 53 =
24,804
composite factor = 2 × 3
3 × 13 × 53 =
37,206
composite factor = 2
2 × 3
3 × 13 × 53 =
74,412
48 factors (divisors)
What times what is 74,412?
What number multiplied by what number equals 74,412?
All the combinations of any two natural numbers whose product equals 74,412.
1 × 74,412 = 74,412
2 × 37,206 = 74,412
3 × 24,804 = 74,412
4 × 18,603 = 74,412
6 × 12,402 = 74,412
9 × 8,268 = 74,412
12 × 6,201 = 74,412
13 × 5,724 = 74,412
18 × 4,134 = 74,412
26 × 2,862 = 74,412
27 × 2,756 = 74,412
36 × 2,067 = 74,412
39 × 1,908 = 74,412
52 × 1,431 = 74,412
53 × 1,404 = 74,412
54 × 1,378 = 74,412
78 × 954 = 74,412
106 × 702 = 74,412
108 × 689 = 74,412
117 × 636 = 74,412
156 × 477 = 74,412
159 × 468 = 74,412
212 × 351 = 74,412
234 × 318 = 74,412
24 unique multiplications The final answer:
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