Q: What are the prime factors of the number 404,864?

 A: 2, 3163

Why are those the prime factors of the number 404,864?

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 404,864

404,864
Factor Arrows
2202,432
Factor Arrows
2101,216
Factor Arrows
250,608
Factor Arrows
225,304
Factor Arrows
212,652
Factor Arrows
26,326
Factor Arrows
23,163

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, 3163

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 2 x 3,163 = 404,864

This can also be written as 27 x 3,1631 = 404,864

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


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