Q: What are the prime factors of the number 30,672?

 A: 2, 3, 71

Why are those the prime factors of the number 30,672?

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 30,672

30,672
Factor Arrows
215,336
Factor Arrows
27,668
Factor Arrows
23,834
Factor Arrows
21,917
Factor Arrows
3639
Factor Arrows
3213
Factor Arrows
371

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, 71

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 71 = 30,672

This can also be written as 24 x 33 x 711 = 30,672

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


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