Q: What are the prime factors of the number 31,312,008?

 A: 2, 3, 7, 13, 59

Why are those the prime factors of the number 31,312,008?

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 31,312,008

31,312,008
Factor Arrows
215,656,004
Factor Arrows
27,828,002
Factor Arrows
23,914,001
Factor Arrows
31,304,667
Factor Arrows
3434,889
Factor Arrows
3144,963
Factor Arrows
348,321
Factor Arrows
316,107
Factor Arrows
35,369
Factor Arrows
7767
Factor Arrows
1359

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, 7, 13, 59

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 3 x 3 x 3 x 7 x 13 x 59 = 31,312,008

This can also be written as 23 x 36 x 71 x 131 x 591 = 31,312,008

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


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