To find all the divisors of the number 13,175,980:
- 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 13,175,980:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
13,175,980 = 22 × 5 × 47 × 107 × 131
13,175,980 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 13,175,980
- 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
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 5 =
10
composite factor = 2
2 × 5 =
20
prime factor =
47
composite factor = 2 × 47 =
94
prime factor =
107
prime factor =
131
composite factor = 2
2 × 47 =
188
composite factor = 2 × 107 =
214
composite factor = 5 × 47 =
235
composite factor = 2 × 131 =
262
composite factor = 2
2 × 107 =
428
composite factor = 2 × 5 × 47 =
470
composite factor = 2
2 × 131 =
524
composite factor = 5 × 107 =
535
composite factor = 5 × 131 =
655
composite factor = 2
2 × 5 × 47 =
940
composite factor = 2 × 5 × 107 =
1,070
composite factor = 2 × 5 × 131 =
1,310
composite factor = 2
2 × 5 × 107 =
2,140
composite factor = 2
2 × 5 × 131 =
2,620
This list continues below...
... This list continues from above
composite factor = 47 × 107 =
5,029
composite factor = 47 × 131 =
6,157
composite factor = 2 × 47 × 107 =
10,058
composite factor = 2 × 47 × 131 =
12,314
composite factor = 107 × 131 =
14,017
composite factor = 2
2 × 47 × 107 =
20,116
composite factor = 2
2 × 47 × 131 =
24,628
composite factor = 5 × 47 × 107 =
25,145
composite factor = 2 × 107 × 131 =
28,034
composite factor = 5 × 47 × 131 =
30,785
composite factor = 2 × 5 × 47 × 107 =
50,290
composite factor = 2
2 × 107 × 131 =
56,068
composite factor = 2 × 5 × 47 × 131 =
61,570
composite factor = 5 × 107 × 131 =
70,085
composite factor = 2
2 × 5 × 47 × 107 =
100,580
composite factor = 2
2 × 5 × 47 × 131 =
123,140
composite factor = 2 × 5 × 107 × 131 =
140,170
composite factor = 2
2 × 5 × 107 × 131 =
280,340
composite factor = 47 × 107 × 131 =
658,799
composite factor = 2 × 47 × 107 × 131 =
1,317,598
composite factor = 2
2 × 47 × 107 × 131 =
2,635,196
composite factor = 5 × 47 × 107 × 131 =
3,293,995
composite factor = 2 × 5 × 47 × 107 × 131 =
6,587,990
composite factor = 2
2 × 5 × 47 × 107 × 131 =
13,175,980
48 factors (divisors)
What times what is 13,175,980?
What number multiplied by what number equals 13,175,980?
All the combinations of any two natural numbers whose product equals 13,175,980.
1 × 13,175,980 = 13,175,980
2 × 6,587,990 = 13,175,980
4 × 3,293,995 = 13,175,980
5 × 2,635,196 = 13,175,980
10 × 1,317,598 = 13,175,980
20 × 658,799 = 13,175,980
47 × 280,340 = 13,175,980
94 × 140,170 = 13,175,980
107 × 123,140 = 13,175,980
131 × 100,580 = 13,175,980
188 × 70,085 = 13,175,980
214 × 61,570 = 13,175,980
235 × 56,068 = 13,175,980
262 × 50,290 = 13,175,980
428 × 30,785 = 13,175,980
470 × 28,034 = 13,175,980
524 × 25,145 = 13,175,980
535 × 24,628 = 13,175,980
655 × 20,116 = 13,175,980
940 × 14,017 = 13,175,980
1,070 × 12,314 = 13,175,980
1,310 × 10,058 = 13,175,980
2,140 × 6,157 = 13,175,980
2,620 × 5,029 = 13,175,980
24 unique multiplications The final answer:
(scroll down)