Q: What are the prime factors of the number 31,442,229?

 A: 3, 7, 13, 67, 191

Why are those the prime factors of the number 31,442,229?

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 31,442,229

31,442,229
Factor Arrows
310,480,743
Factor Arrows
33,493,581
Factor Arrows
31,164,527
Factor Arrows
7166,361
Factor Arrows
1312,797
Factor Arrows
67191

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, 7, 13, 67, 191

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 7 x 13 x 67 x 191 = 31,442,229

This can also be written as 33 x 71 x 131 x 671 x 1911 = 31,442,229

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


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