Q: What are the prime factors of the number 231,198?

 A: 2, 3, 11, 31, 113

Why are those the prime factors of the number 231,198?

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 231,198

231,198
Factor Arrows
2115,599
Factor Arrows
338,533
Factor Arrows
113,503
Factor Arrows
31113

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, 31, 113

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 31 x 113 = 231,198

This can also be written as 21 x 31 x 111 x 311 x 1131 = 231,198

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


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