Q: What are the prime factors of the number 31,001,319?

 A: 3, 17, 29, 137

Why are those the prime factors of the number 31,001,319?

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 31,001,319

31,001,319
Factor Arrows
310,333,773
Factor Arrows
33,444,591
Factor Arrows
31,148,197
Factor Arrows
1767,541
Factor Arrows
173,973
Factor Arrows
29137

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, 17, 29, 137

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 17 x 17 x 29 x 137 = 31,001,319

This can also be written as 33 x 172 x 291 x 1371 = 31,001,319

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


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