Q: What are the prime factors of the number 31,423,344?

 A: 2, 3, 17, 97, 397

Why are those the prime factors of the number 31,423,344?

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 31,423,344

31,423,344
Factor Arrows
215,711,672
Factor Arrows
27,855,836
Factor Arrows
23,927,918
Factor Arrows
21,963,959
Factor Arrows
3654,653
Factor Arrows
1738,509
Factor Arrows
97397

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, 17, 97, 397

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 17 x 97 x 397 = 31,423,344

This can also be written as 24 x 31 x 171 x 971 x 3971 = 31,423,344

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


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