Q: What are the prime factors of the number 638,799?

 A: 3, 7, 19, 1601

Why are those the prime factors of the number 638,799?

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 638,799

638,799
Factor Arrows
3212,933
Factor Arrows
730,419
Factor Arrows
191,601

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:

3, 7, 19, 1601

We can check our work by multiplying all of the prime factors together: 3 x 7 x 19 x 1,601 = 638,799

This can also be written as 31 x 71 x 191 x 1,6011 = 638,799

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


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