Q: What are the prime factors of the number 406,688?

 A: 2, 71, 179

Why are those the prime factors of the number 406,688?

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 406,688

406,688
Factor Arrows
2203,344
Factor Arrows
2101,672
Factor Arrows
250,836
Factor Arrows
225,418
Factor Arrows
212,709
Factor Arrows
71179

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, 71, 179

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 71 x 179 = 406,688

This can also be written as 25 x 711 x 1791 = 406,688

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


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