Q: What are the prime factors of the number 27,864?

 A: 2, 3, 43

Why are those the prime factors of the number 27,864?

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 27,864

27,864
Factor Arrows
213,932
Factor Arrows
26,966
Factor Arrows
23,483
Factor Arrows
31,161
Factor Arrows
3387
Factor Arrows
3129
Factor Arrows
343

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, 43

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 43 = 27,864

This can also be written as 23 x 34 x 431 = 27,864

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


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