Q: What are the prime factors of the number 27,241,728?

 A: 2, 3, 79, 449

Why are those the prime factors of the number 27,241,728?

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 27,241,728

27,241,728
Factor Arrows
213,620,864
Factor Arrows
26,810,432
Factor Arrows
23,405,216
Factor Arrows
21,702,608
Factor Arrows
2851,304
Factor Arrows
2425,652
Factor Arrows
2212,826
Factor Arrows
2106,413
Factor Arrows
335,471
Factor Arrows
79449

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, 79, 449

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 2 x 2 x 3 x 79 x 449 = 27,241,728

This can also be written as 28 x 31 x 791 x 4491 = 27,241,728

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


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