Q: What are the prime factors of the number 331,338,272?

 A: 2, 2531, 4091

Why are those the prime factors of the number 331,338,272?

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 331,338,272

331,338,272
Factor Arrows
2165,669,136
Factor Arrows
282,834,568
Factor Arrows
241,417,284
Factor Arrows
220,708,642
Factor Arrows
210,354,321
Factor Arrows
2,5314,091

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, 2531, 4091

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2,531 x 4,091 = 331,338,272

This can also be written as 25 x 2,5311 x 4,0911 = 331,338,272

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


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