Q: What are the prime factors of the number 31,926,960?

 A: 2, 3, 5, 13, 379

Why are those the prime factors of the number 31,926,960?

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 31,926,960

31,926,960
Factor Arrows
215,963,480
Factor Arrows
27,981,740
Factor Arrows
23,990,870
Factor Arrows
21,995,435
Factor Arrows
3665,145
Factor Arrows
3221,715
Factor Arrows
373,905
Factor Arrows
324,635
Factor Arrows
54,927
Factor Arrows
13379

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, 13, 379

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 13 x 379 = 31,926,960

This can also be written as 24 x 34 x 51 x 131 x 3791 = 31,926,960

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


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