Q: What are the prime factors of the number 13,898,605?

 A: 5, 7, 17, 47, 71

Why are those the prime factors of the number 13,898,605?

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 13,898,605

13,898,605
Factor Arrows
52,779,721
Factor Arrows
7397,103
Factor Arrows
756,729
Factor Arrows
173,337
Factor Arrows
4771

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, 17, 47, 71

We can check our work by multiplying all of the prime factors together: 5 x 7 x 7 x 17 x 47 x 71 = 13,898,605

This can also be written as 51 x 72 x 171 x 471 x 711 = 13,898,605

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


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