To find all the divisors of the number 83,157,642:
- 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 83,157,642:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
83,157,642 = 2 × 32 × 17 × 19 × 14,303
83,157,642 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) × (2 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 3 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 83,157,642
- 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 × 3 =
6
composite factor = 3
2 =
9
prime factor =
17
composite factor = 2 × 3
2 =
18
prime factor =
19
composite factor = 2 × 17 =
34
composite factor = 2 × 19 =
38
composite factor = 3 × 17 =
51
composite factor = 3 × 19 =
57
composite factor = 2 × 3 × 17 =
102
composite factor = 2 × 3 × 19 =
114
composite factor = 3
2 × 17 =
153
composite factor = 3
2 × 19 =
171
composite factor = 2 × 3
2 × 17 =
306
composite factor = 17 × 19 =
323
composite factor = 2 × 3
2 × 19 =
342
composite factor = 2 × 17 × 19 =
646
composite factor = 3 × 17 × 19 =
969
composite factor = 2 × 3 × 17 × 19 =
1,938
composite factor = 3
2 × 17 × 19 =
2,907
composite factor = 2 × 3
2 × 17 × 19 =
5,814
This list continues below...
... This list continues from above
prime factor =
14,303
composite factor = 2 × 14,303 =
28,606
composite factor = 3 × 14,303 =
42,909
composite factor = 2 × 3 × 14,303 =
85,818
composite factor = 3
2 × 14,303 =
128,727
composite factor = 17 × 14,303 =
243,151
composite factor = 2 × 3
2 × 14,303 =
257,454
composite factor = 19 × 14,303 =
271,757
composite factor = 2 × 17 × 14,303 =
486,302
composite factor = 2 × 19 × 14,303 =
543,514
composite factor = 3 × 17 × 14,303 =
729,453
composite factor = 3 × 19 × 14,303 =
815,271
composite factor = 2 × 3 × 17 × 14,303 =
1,458,906
composite factor = 2 × 3 × 19 × 14,303 =
1,630,542
composite factor = 3
2 × 17 × 14,303 =
2,188,359
composite factor = 3
2 × 19 × 14,303 =
2,445,813
composite factor = 2 × 3
2 × 17 × 14,303 =
4,376,718
composite factor = 17 × 19 × 14,303 =
4,619,869
composite factor = 2 × 3
2 × 19 × 14,303 =
4,891,626
composite factor = 2 × 17 × 19 × 14,303 =
9,239,738
composite factor = 3 × 17 × 19 × 14,303 =
13,859,607
composite factor = 2 × 3 × 17 × 19 × 14,303 =
27,719,214
composite factor = 3
2 × 17 × 19 × 14,303 =
41,578,821
composite factor = 2 × 3
2 × 17 × 19 × 14,303 =
83,157,642
48 factors (divisors)
What times what is 83,157,642?
What number multiplied by what number equals 83,157,642?
All the combinations of any two natural numbers whose product equals 83,157,642.
1 × 83,157,642 = 83,157,642
2 × 41,578,821 = 83,157,642
3 × 27,719,214 = 83,157,642
6 × 13,859,607 = 83,157,642
9 × 9,239,738 = 83,157,642
17 × 4,891,626 = 83,157,642
18 × 4,619,869 = 83,157,642
19 × 4,376,718 = 83,157,642
34 × 2,445,813 = 83,157,642
38 × 2,188,359 = 83,157,642
51 × 1,630,542 = 83,157,642
57 × 1,458,906 = 83,157,642
102 × 815,271 = 83,157,642
114 × 729,453 = 83,157,642
153 × 543,514 = 83,157,642
171 × 486,302 = 83,157,642
306 × 271,757 = 83,157,642
323 × 257,454 = 83,157,642
342 × 243,151 = 83,157,642
646 × 128,727 = 83,157,642
969 × 85,818 = 83,157,642
1,938 × 42,909 = 83,157,642
2,907 × 28,606 = 83,157,642
5,814 × 14,303 = 83,157,642
24 unique multiplications The final answer:
(scroll down)