Q: What are the prime factors of the number 31,343,616?

 A: 2, 3, 19, 179

Why are those the prime factors of the number 31,343,616?

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 31,343,616

31,343,616
Factor Arrows
215,671,808
Factor Arrows
27,835,904
Factor Arrows
23,917,952
Factor Arrows
21,958,976
Factor Arrows
2979,488
Factor Arrows
2489,744
Factor Arrows
2244,872
Factor Arrows
2122,436
Factor Arrows
261,218
Factor Arrows
230,609
Factor Arrows
310,203
Factor Arrows
33,401
Factor Arrows
19179

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, 19, 179

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 19 x 179 = 31,343,616

This can also be written as 210 x 32 x 191 x 1791 = 31,343,616

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


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