To find all the divisors of the number 46,740:
- 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 46,740:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
46,740 = 22 × 3 × 5 × 19 × 41
46,740 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 46,740
- 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
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
prime factor =
19
composite factor = 2
2 × 5 =
20
composite factor = 2 × 3 × 5 =
30
composite factor = 2 × 19 =
38
prime factor =
41
composite factor = 3 × 19 =
57
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2
2 × 19 =
76
composite factor = 2 × 41 =
82
composite factor = 5 × 19 =
95
composite factor = 2 × 3 × 19 =
114
composite factor = 3 × 41 =
123
composite factor = 2
2 × 41 =
164
composite factor = 2 × 5 × 19 =
190
composite factor = 5 × 41 =
205
This list continues below...
... This list continues from above
composite factor = 2
2 × 3 × 19 =
228
composite factor = 2 × 3 × 41 =
246
composite factor = 3 × 5 × 19 =
285
composite factor = 2
2 × 5 × 19 =
380
composite factor = 2 × 5 × 41 =
410
composite factor = 2
2 × 3 × 41 =
492
composite factor = 2 × 3 × 5 × 19 =
570
composite factor = 3 × 5 × 41 =
615
composite factor = 19 × 41 =
779
composite factor = 2
2 × 5 × 41 =
820
composite factor = 2
2 × 3 × 5 × 19 =
1,140
composite factor = 2 × 3 × 5 × 41 =
1,230
composite factor = 2 × 19 × 41 =
1,558
composite factor = 3 × 19 × 41 =
2,337
composite factor = 2
2 × 3 × 5 × 41 =
2,460
composite factor = 2
2 × 19 × 41 =
3,116
composite factor = 5 × 19 × 41 =
3,895
composite factor = 2 × 3 × 19 × 41 =
4,674
composite factor = 2 × 5 × 19 × 41 =
7,790
composite factor = 2
2 × 3 × 19 × 41 =
9,348
composite factor = 3 × 5 × 19 × 41 =
11,685
composite factor = 2
2 × 5 × 19 × 41 =
15,580
composite factor = 2 × 3 × 5 × 19 × 41 =
23,370
composite factor = 2
2 × 3 × 5 × 19 × 41 =
46,740
48 factors (divisors)
What times what is 46,740?
What number multiplied by what number equals 46,740?
All the combinations of any two natural numbers whose product equals 46,740.
1 × 46,740 = 46,740
2 × 23,370 = 46,740
3 × 15,580 = 46,740
4 × 11,685 = 46,740
5 × 9,348 = 46,740
6 × 7,790 = 46,740
10 × 4,674 = 46,740
12 × 3,895 = 46,740
15 × 3,116 = 46,740
19 × 2,460 = 46,740
20 × 2,337 = 46,740
30 × 1,558 = 46,740
38 × 1,230 = 46,740
41 × 1,140 = 46,740
57 × 820 = 46,740
60 × 779 = 46,740
76 × 615 = 46,740
82 × 570 = 46,740
95 × 492 = 46,740
114 × 410 = 46,740
123 × 380 = 46,740
164 × 285 = 46,740
190 × 246 = 46,740
205 × 228 = 46,740
24 unique multiplications The final answer:
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