To find all the divisors of the number 58,740:
- 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 58,740:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
58,740 = 22 × 3 × 5 × 11 × 89
58,740 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) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 58,740
- 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
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 11 =
33
composite factor = 2
2 × 11 =
44
composite factor = 5 × 11 =
55
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 3 × 11 =
66
prime factor =
89
composite factor = 2 × 5 × 11 =
110
composite factor = 2
2 × 3 × 11 =
132
composite factor = 3 × 5 × 11 =
165
composite factor = 2 × 89 =
178
composite factor = 2
2 × 5 × 11 =
220
This list continues below...
... This list continues from above
composite factor = 3 × 89 =
267
composite factor = 2 × 3 × 5 × 11 =
330
composite factor = 2
2 × 89 =
356
composite factor = 5 × 89 =
445
composite factor = 2 × 3 × 89 =
534
composite factor = 2
2 × 3 × 5 × 11 =
660
composite factor = 2 × 5 × 89 =
890
composite factor = 11 × 89 =
979
composite factor = 2
2 × 3 × 89 =
1,068
composite factor = 3 × 5 × 89 =
1,335
composite factor = 2
2 × 5 × 89 =
1,780
composite factor = 2 × 11 × 89 =
1,958
composite factor = 2 × 3 × 5 × 89 =
2,670
composite factor = 3 × 11 × 89 =
2,937
composite factor = 2
2 × 11 × 89 =
3,916
composite factor = 5 × 11 × 89 =
4,895
composite factor = 2
2 × 3 × 5 × 89 =
5,340
composite factor = 2 × 3 × 11 × 89 =
5,874
composite factor = 2 × 5 × 11 × 89 =
9,790
composite factor = 2
2 × 3 × 11 × 89 =
11,748
composite factor = 3 × 5 × 11 × 89 =
14,685
composite factor = 2
2 × 5 × 11 × 89 =
19,580
composite factor = 2 × 3 × 5 × 11 × 89 =
29,370
composite factor = 2
2 × 3 × 5 × 11 × 89 =
58,740
48 factors (divisors)
What times what is 58,740?
What number multiplied by what number equals 58,740?
All the combinations of any two natural numbers whose product equals 58,740.
1 × 58,740 = 58,740
2 × 29,370 = 58,740
3 × 19,580 = 58,740
4 × 14,685 = 58,740
5 × 11,748 = 58,740
6 × 9,790 = 58,740
10 × 5,874 = 58,740
11 × 5,340 = 58,740
12 × 4,895 = 58,740
15 × 3,916 = 58,740
20 × 2,937 = 58,740
22 × 2,670 = 58,740
30 × 1,958 = 58,740
33 × 1,780 = 58,740
44 × 1,335 = 58,740
55 × 1,068 = 58,740
60 × 979 = 58,740
66 × 890 = 58,740
89 × 660 = 58,740
110 × 534 = 58,740
132 × 445 = 58,740
165 × 356 = 58,740
178 × 330 = 58,740
220 × 267 = 58,740
24 unique multiplications The final answer:
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