Q: What are the prime factors of the number 13,309,723?

 A: 7, 149, 1823

Why are those the prime factors of the number 13,309,723?

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 13,309,723

13,309,723
Factor Arrows
71,901,389
Factor Arrows
7271,627
Factor Arrows
1491,823

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:

7, 149, 1823

We can check our work by multiplying all of the prime factors together: 7 x 7 x 149 x 1,823 = 13,309,723

This can also be written as 72 x 1491 x 1,8231 = 13,309,723

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


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