Q: What are the prime factors of the number 338,624?

 A: 2, 11, 13, 37

Why are those the prime factors of the number 338,624?

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 338,624

338,624
Factor Arrows
2169,312
Factor Arrows
284,656
Factor Arrows
242,328
Factor Arrows
221,164
Factor Arrows
210,582
Factor Arrows
25,291
Factor Arrows
11481
Factor Arrows
1337

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, 11, 13, 37

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 11 x 13 x 37 = 338,624

This can also be written as 26 x 111 x 131 x 371 = 338,624

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


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