Q: What are the prime factors of the number 231,680?

 A: 2, 5, 181

Why are those the prime factors of the number 231,680?

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 231,680

231,680
Factor Arrows
2115,840
Factor Arrows
257,920
Factor Arrows
228,960
Factor Arrows
214,480
Factor Arrows
27,240
Factor Arrows
23,620
Factor Arrows
21,810
Factor Arrows
2905
Factor Arrows
5181

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, 5, 181

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 5 x 181 = 231,680

This can also be written as 28 x 51 x 1811 = 231,680

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


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