Q: What are the prime factors of the number 3,155,256?

 A: 2, 3, 13, 3371

Why are those the prime factors of the number 3,155,256?

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 3,155,256

3,155,256
Factor Arrows
21,577,628
Factor Arrows
2788,814
Factor Arrows
2394,407
Factor Arrows
3131,469
Factor Arrows
343,823
Factor Arrows
133,371

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, 13, 3371

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 13 x 3,371 = 3,155,256

This can also be written as 23 x 32 x 131 x 3,3711 = 3,155,256

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


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