Q: What are the prime factors of the number 418,665?

 A: 3, 5, 13, 19, 113

Why are those the prime factors of the number 418,665?

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 418,665

418,665
Factor Arrows
3139,555
Factor Arrows
527,911
Factor Arrows
132,147
Factor Arrows
19113

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, 5, 13, 19, 113

We can check our work by multiplying all of the prime factors together: 3 x 5 x 13 x 19 x 113 = 418,665

This can also be written as 31 x 51 x 131 x 191 x 1131 = 418,665

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


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