Q: What are the prime factors of the number 31,960,544?

 A: 2, 7, 11, 17, 109

Why are those the prime factors of the number 31,960,544?

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 31,960,544

31,960,544
Factor Arrows
215,980,272
Factor Arrows
27,990,136
Factor Arrows
23,995,068
Factor Arrows
21,997,534
Factor Arrows
2998,767
Factor Arrows
7142,681
Factor Arrows
720,383
Factor Arrows
111,853
Factor Arrows
17109

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, 7, 11, 17, 109

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 7 x 11 x 17 x 109 = 31,960,544

This can also be written as 25 x 72 x 111 x 171 x 1091 = 31,960,544

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


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