Q: What are the prime factors of the number 11,515,008?

 A: 2, 3, 157, 191

Why are those the prime factors of the number 11,515,008?

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 11,515,008

11,515,008
Factor Arrows
25,757,504
Factor Arrows
22,878,752
Factor Arrows
21,439,376
Factor Arrows
2719,688
Factor Arrows
2359,844
Factor Arrows
2179,922
Factor Arrows
289,961
Factor Arrows
329,987
Factor Arrows
157191

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, 157, 191

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 157 x 191 = 11,515,008

This can also be written as 27 x 31 x 1571 x 1911 = 11,515,008

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


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