To find all the divisors of the number 13,175,670:
- 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 13,175,670:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
13,175,670 = 2 × 3 × 5 × 431 × 1,019
13,175,670 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 13,175,670
- 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 =
3
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2 × 5 =
10
composite factor = 3 × 5 =
15
composite factor = 2 × 3 × 5 =
30
prime factor =
431
composite factor = 2 × 431 =
862
prime factor =
1,019
composite factor = 3 × 431 =
1,293
composite factor = 2 × 1,019 =
2,038
composite factor = 5 × 431 =
2,155
composite factor = 2 × 3 × 431 =
2,586
composite factor = 3 × 1,019 =
3,057
This list continues below...
... This list continues from above
composite factor = 2 × 5 × 431 =
4,310
composite factor = 5 × 1,019 =
5,095
composite factor = 2 × 3 × 1,019 =
6,114
composite factor = 3 × 5 × 431 =
6,465
composite factor = 2 × 5 × 1,019 =
10,190
composite factor = 2 × 3 × 5 × 431 =
12,930
composite factor = 3 × 5 × 1,019 =
15,285
composite factor = 2 × 3 × 5 × 1,019 =
30,570
composite factor = 431 × 1,019 =
439,189
composite factor = 2 × 431 × 1,019 =
878,378
composite factor = 3 × 431 × 1,019 =
1,317,567
composite factor = 5 × 431 × 1,019 =
2,195,945
composite factor = 2 × 3 × 431 × 1,019 =
2,635,134
composite factor = 2 × 5 × 431 × 1,019 =
4,391,890
composite factor = 3 × 5 × 431 × 1,019 =
6,587,835
composite factor = 2 × 3 × 5 × 431 × 1,019 =
13,175,670
32 factors (divisors)
What times what is 13,175,670?
What number multiplied by what number equals 13,175,670?
All the combinations of any two natural numbers whose product equals 13,175,670.
1 × 13,175,670 = 13,175,670
2 × 6,587,835 = 13,175,670
3 × 4,391,890 = 13,175,670
5 × 2,635,134 = 13,175,670
6 × 2,195,945 = 13,175,670
10 × 1,317,567 = 13,175,670
15 × 878,378 = 13,175,670
30 × 439,189 = 13,175,670
431 × 30,570 = 13,175,670
862 × 15,285 = 13,175,670
1,019 × 12,930 = 13,175,670
1,293 × 10,190 = 13,175,670
2,038 × 6,465 = 13,175,670
2,155 × 6,114 = 13,175,670
2,586 × 5,095 = 13,175,670
3,057 × 4,310 = 13,175,670
16 unique multiplications The final answer:
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