Q: What are the prime factors of the number 31,323,180?

 A: 2, 3, 5, 7, 17, 41, 107

Why are those the prime factors of the number 31,323,180?

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 31,323,180

31,323,180
Factor Arrows
215,661,590
Factor Arrows
27,830,795
Factor Arrows
32,610,265
Factor Arrows
5522,053
Factor Arrows
774,579
Factor Arrows
174,387
Factor Arrows
41107

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, 5, 7, 17, 41, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 7 x 17 x 41 x 107 = 31,323,180

This can also be written as 22 x 31 x 51 x 71 x 171 x 411 x 1071 = 31,323,180

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


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