To find all the divisors of the number 846,430:
- 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 846,430:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
846,430 = 2 × 5 × 13 × 17 × 383
846,430 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 846,430
- 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 =
13
prime factor =
17
composite factor = 2 × 13 =
26
composite factor = 2 × 17 =
34
composite factor = 5 × 13 =
65
composite factor = 5 × 17 =
85
composite factor = 2 × 5 × 13 =
130
composite factor = 2 × 5 × 17 =
170
composite factor = 13 × 17 =
221
prime factor =
383
composite factor = 2 × 13 × 17 =
442
composite factor = 2 × 383 =
766
This list continues below...
... This list continues from above
composite factor = 5 × 13 × 17 =
1,105
composite factor = 5 × 383 =
1,915
composite factor = 2 × 5 × 13 × 17 =
2,210
composite factor = 2 × 5 × 383 =
3,830
composite factor = 13 × 383 =
4,979
composite factor = 17 × 383 =
6,511
composite factor = 2 × 13 × 383 =
9,958
composite factor = 2 × 17 × 383 =
13,022
composite factor = 5 × 13 × 383 =
24,895
composite factor = 5 × 17 × 383 =
32,555
composite factor = 2 × 5 × 13 × 383 =
49,790
composite factor = 2 × 5 × 17 × 383 =
65,110
composite factor = 13 × 17 × 383 =
84,643
composite factor = 2 × 13 × 17 × 383 =
169,286
composite factor = 5 × 13 × 17 × 383 =
423,215
composite factor = 2 × 5 × 13 × 17 × 383 =
846,430
32 factors (divisors)
What times what is 846,430?
What number multiplied by what number equals 846,430?
All the combinations of any two natural numbers whose product equals 846,430.
1 × 846,430 = 846,430
2 × 423,215 = 846,430
5 × 169,286 = 846,430
10 × 84,643 = 846,430
13 × 65,110 = 846,430
17 × 49,790 = 846,430
26 × 32,555 = 846,430
34 × 24,895 = 846,430
65 × 13,022 = 846,430
85 × 9,958 = 846,430
130 × 6,511 = 846,430
170 × 4,979 = 846,430
221 × 3,830 = 846,430
383 × 2,210 = 846,430
442 × 1,915 = 846,430
766 × 1,105 = 846,430
16 unique multiplications The final answer:
(scroll down)