Q: What are the prime factors of the number 31,904,874?

 A: 2, 3, 199, 2969

Why are those the prime factors of the number 31,904,874?

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 31,904,874

31,904,874
Factor Arrows
215,952,437
Factor Arrows
35,317,479
Factor Arrows
31,772,493
Factor Arrows
3590,831
Factor Arrows
1992,969

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, 199, 2969

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 199 x 2,969 = 31,904,874

This can also be written as 21 x 33 x 1991 x 2,9691 = 31,904,874

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


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