Q: What are the prime factors of the number 51,744?

 A: 2, 3, 7, 11

Why are those the prime factors of the number 51,744?

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 51,744

51,744
Factor Arrows
225,872
Factor Arrows
212,936
Factor Arrows
26,468
Factor Arrows
23,234
Factor Arrows
21,617
Factor Arrows
3539
Factor Arrows
777
Factor Arrows
711

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, 11

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 7 x 11 = 51,744

This can also be written as 25 x 31 x 72 x 111 = 51,744

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


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