Q: What are the prime factors of the number 415,625?

 A: 5, 7, 19

Why are those the prime factors of the number 415,625?

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 415,625

415,625
Factor Arrows
583,125
Factor Arrows
516,625
Factor Arrows
53,325
Factor Arrows
5665
Factor Arrows
5133
Factor Arrows
719

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:

5, 7, 19

We can check our work by multiplying all of the prime factors together: 5 x 5 x 5 x 5 x 5 x 7 x 19 = 415,625

This can also be written as 55 x 71 x 191 = 415,625

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


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