Q: What are the prime factors of the number 107,328?

 A: 2, 3, 13, 43

Why are those the prime factors of the number 107,328?

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 107,328

107,328
Factor Arrows
253,664
Factor Arrows
226,832
Factor Arrows
213,416
Factor Arrows
26,708
Factor Arrows
23,354
Factor Arrows
21,677
Factor Arrows
3559
Factor Arrows
1343

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, 13, 43

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 13 x 43 = 107,328

This can also be written as 26 x 31 x 131 x 431 = 107,328

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


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