Q: What are the prime factors of the number 16,738,605?

 A: 3, 5, 13, 31, 71

Why are those the prime factors of the number 16,738,605?

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 16,738,605

16,738,605
Factor Arrows
35,579,535
Factor Arrows
31,859,845
Factor Arrows
5371,969
Factor Arrows
1328,613
Factor Arrows
132,201
Factor Arrows
3171

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:

3, 5, 13, 31, 71

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 13 x 13 x 31 x 71 = 16,738,605

This can also be written as 32 x 51 x 132 x 311 x 711 = 16,738,605

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


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