Q: What are the prime factors of the number 231,240?

 A: 2, 3, 5, 41, 47

Why are those the prime factors of the number 231,240?

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 231,240

231,240
Factor Arrows
2115,620
Factor Arrows
257,810
Factor Arrows
228,905
Factor Arrows
39,635
Factor Arrows
51,927
Factor Arrows
4147

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, 5, 41, 47

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 41 x 47 = 231,240

This can also be written as 23 x 31 x 51 x 411 x 471 = 231,240

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


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