Q: What are the prime factors of the number 28,855,359?

 A: 3, 13, 67, 409

Why are those the prime factors of the number 28,855,359?

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 28,855,359

28,855,359
Factor Arrows
39,618,453
Factor Arrows
33,206,151
Factor Arrows
31,068,717
Factor Arrows
3356,239
Factor Arrows
1327,403
Factor Arrows
67409

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:

3, 13, 67, 409

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 13 x 67 x 409 = 28,855,359

This can also be written as 34 x 131 x 671 x 4091 = 28,855,359

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


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