Q: What are the prime factors of the number 331,012,224?

 A: 2, 3, 19, 71

Why are those the prime factors of the number 331,012,224?

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 331,012,224

331,012,224
Factor Arrows
2165,506,112
Factor Arrows
282,753,056
Factor Arrows
241,376,528
Factor Arrows
220,688,264
Factor Arrows
210,344,132
Factor Arrows
25,172,066
Factor Arrows
22,586,033
Factor Arrows
3862,011
Factor Arrows
3287,337
Factor Arrows
395,779
Factor Arrows
195,041
Factor Arrows
7171

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, 3, 19, 71

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3 x 19 x 71 x 71 = 331,012,224

This can also be written as 27 x 33 x 191 x 712 = 331,012,224

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


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