Q: What are the prime factors of the number 331,992?

 A: 2, 3, 29, 53

Why are those the prime factors of the number 331,992?

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 331,992

331,992
Factor Arrows
2165,996
Factor Arrows
282,998
Factor Arrows
241,499
Factor Arrows
313,833
Factor Arrows
34,611
Factor Arrows
31,537
Factor Arrows
2953

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, 29, 53

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 29 x 53 = 331,992

This can also be written as 23 x 33 x 291 x 531 = 331,992

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


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