To find all the divisors of the number 46,427,390:
- 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 46,427,390:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
46,427,390 = 2 × 5 × 127 × 139 × 263
46,427,390 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 = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 46,427,390
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- 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 =
5
composite factor = 2 × 5 =
10
prime factor =
127
prime factor =
139
composite factor = 2 × 127 =
254
prime factor =
263
composite factor = 2 × 139 =
278
composite factor = 2 × 263 =
526
composite factor = 5 × 127 =
635
composite factor = 5 × 139 =
695
composite factor = 2 × 5 × 127 =
1,270
composite factor = 5 × 263 =
1,315
composite factor = 2 × 5 × 139 =
1,390
composite factor = 2 × 5 × 263 =
2,630
This list continues below...
... This list continues from above
composite factor = 127 × 139 =
17,653
composite factor = 127 × 263 =
33,401
composite factor = 2 × 127 × 139 =
35,306
composite factor = 139 × 263 =
36,557
composite factor = 2 × 127 × 263 =
66,802
composite factor = 2 × 139 × 263 =
73,114
composite factor = 5 × 127 × 139 =
88,265
composite factor = 5 × 127 × 263 =
167,005
composite factor = 2 × 5 × 127 × 139 =
176,530
composite factor = 5 × 139 × 263 =
182,785
composite factor = 2 × 5 × 127 × 263 =
334,010
composite factor = 2 × 5 × 139 × 263 =
365,570
composite factor = 127 × 139 × 263 =
4,642,739
composite factor = 2 × 127 × 139 × 263 =
9,285,478
composite factor = 5 × 127 × 139 × 263 =
23,213,695
composite factor = 2 × 5 × 127 × 139 × 263 =
46,427,390
32 factors (divisors)
What times what is 46,427,390?
What number multiplied by what number equals 46,427,390?
All the combinations of any two natural numbers whose product equals 46,427,390.
1 × 46,427,390 = 46,427,390
2 × 23,213,695 = 46,427,390
5 × 9,285,478 = 46,427,390
10 × 4,642,739 = 46,427,390
127 × 365,570 = 46,427,390
139 × 334,010 = 46,427,390
254 × 182,785 = 46,427,390
263 × 176,530 = 46,427,390
278 × 167,005 = 46,427,390
526 × 88,265 = 46,427,390
635 × 73,114 = 46,427,390
695 × 66,802 = 46,427,390
1,270 × 36,557 = 46,427,390
1,315 × 35,306 = 46,427,390
1,390 × 33,401 = 46,427,390
2,630 × 17,653 = 46,427,390
16 unique multiplications The final answer:
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