Q: What are the prime factors of the number 418,624?

 A: 2, 31, 211

Why are those the prime factors of the number 418,624?

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 418,624

418,624
Factor Arrows
2209,312
Factor Arrows
2104,656
Factor Arrows
252,328
Factor Arrows
226,164
Factor Arrows
213,082
Factor Arrows
26,541
Factor Arrows
31211

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, 31, 211

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 31 x 211 = 418,624

This can also be written as 26 x 311 x 2111 = 418,624

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


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