Q: What are the prime factors of the number 308,160?

 A: 2, 3, 5, 107

Why are those the prime factors of the number 308,160?

Prime factors are the prime numbers that can be multipled together to equal the original number. You find the factors by dividing by prime numbers. It is best shown by creating a Factor Tree.

Factor Tree for the number 308,160

308,160
Factor Arrows
2154,080
Factor Arrows
277,040
Factor Arrows
238,520
Factor Arrows
219,260
Factor Arrows
29,630
Factor Arrows
24,815
Factor Arrows
31,605
Factor Arrows
3535
Factor Arrows
5107

The numbers in bold above are the prime factors. If there are multiples, you only count them one time. This leads us to our prime factors of:

2, 3, 5, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 5 x 107 = 308,160

This can also be written as 26 x 32 x 51 x 1071 = 308,160

If you would like to know more, or need additional explanation, please review our prime factorization explanation.


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