Q: What are the prime factors of the number 338,976?

 A: 2, 3, 11, 107

Why are those the prime factors of the number 338,976?

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 338,976

338,976
Factor Arrows
2169,488
Factor Arrows
284,744
Factor Arrows
242,372
Factor Arrows
221,186
Factor Arrows
210,593
Factor Arrows
33,531
Factor Arrows
31,177
Factor Arrows
11107

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, 11, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 11 x 107 = 338,976

This can also be written as 25 x 32 x 111 x 1071 = 338,976

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


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