Q: What are the prime factors of the number 404,624?

 A: 2, 11, 19

Why are those the prime factors of the number 404,624?

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 404,624

404,624
Factor Arrows
2202,312
Factor Arrows
2101,156
Factor Arrows
250,578
Factor Arrows
225,289
Factor Arrows
112,299
Factor Arrows
11209
Factor Arrows
1119

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, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 11 x 11 x 11 x 19 = 404,624

This can also be written as 24 x 113 x 191 = 404,624

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


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