Q: What are the prime factors of the number 231,431,424?

 A: 2, 3, 7, 43049

Why are those the prime factors of the number 231,431,424?

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 231,431,424

231,431,424
Factor Arrows
2115,715,712
Factor Arrows
257,857,856
Factor Arrows
228,928,928
Factor Arrows
214,464,464
Factor Arrows
27,232,232
Factor Arrows
23,616,116
Factor Arrows
21,808,058
Factor Arrows
2904,029
Factor Arrows
3301,343
Factor Arrows
743,049

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, 7, 43049

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 3 x 7 x 43,049 = 231,431,424

This can also be written as 28 x 31 x 71 x 43,0491 = 231,431,424

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


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