Q: What are the prime factors of the number 51,678?

 A: 2, 3, 11, 29

Why are those the prime factors of the number 51,678?

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 51,678

51,678
Factor Arrows
225,839
Factor Arrows
38,613
Factor Arrows
32,871
Factor Arrows
3957
Factor Arrows
3319
Factor Arrows
1129

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, 11, 29

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 3 x 11 x 29 = 51,678

This can also be written as 21 x 34 x 111 x 291 = 51,678

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


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