Q: What are the prime factors of the number 71,767,728?

 A: 2, 3, 23, 31, 233

Why are those the prime factors of the number 71,767,728?

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 71,767,728

71,767,728
Factor Arrows
235,883,864
Factor Arrows
217,941,932
Factor Arrows
28,970,966
Factor Arrows
24,485,483
Factor Arrows
31,495,161
Factor Arrows
3498,387
Factor Arrows
3166,129
Factor Arrows
237,223
Factor Arrows
31233

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, 23, 31, 233

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 23 x 31 x 233 = 71,767,728

This can also be written as 24 x 33 x 231 x 311 x 2331 = 71,767,728

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


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