Q: What are the prime factors of the number 27,558,972?

 A: 2, 3, 7, 17, 919

Why are those the prime factors of the number 27,558,972?

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 27,558,972

27,558,972
Factor Arrows
213,779,486
Factor Arrows
26,889,743
Factor Arrows
32,296,581
Factor Arrows
3765,527
Factor Arrows
7109,361
Factor Arrows
715,623
Factor Arrows
17919

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, 7, 17, 919

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 3 x 7 x 7 x 17 x 919 = 27,558,972

This can also be written as 22 x 32 x 72 x 171 x 9191 = 27,558,972

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


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