Q: What are the prime factors of the number 331,232,020?

 A: 2, 5, 7, 211, 11213

Why are those the prime factors of the number 331,232,020?

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 331,232,020

331,232,020
Factor Arrows
2165,616,010
Factor Arrows
282,808,005
Factor Arrows
516,561,601
Factor Arrows
72,365,943
Factor Arrows
21111,213

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, 5, 7, 211, 11213

We can check our work by multiplying all of the prime factors together: 2 x 2 x 5 x 7 x 211 x 11,213 = 331,232,020

This can also be written as 22 x 51 x 71 x 2111 x 11,2131 = 331,232,020

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


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