Q: What are the prime factors of the number 231,231,000?

 A: 2, 3, 5, 7, 11, 13

Why are those the prime factors of the number 231,231,000?

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 231,231,000

231,231,000
Factor Arrows
2115,615,500
Factor Arrows
257,807,750
Factor Arrows
228,903,875
Factor Arrows
39,634,625
Factor Arrows
51,926,925
Factor Arrows
5385,385
Factor Arrows
577,077
Factor Arrows
711,011
Factor Arrows
71,573
Factor Arrows
11143
Factor Arrows
1113

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, 7, 11, 13

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 5 x 7 x 7 x 11 x 11 x 13 = 231,231,000

This can also be written as 23 x 31 x 53 x 72 x 112 x 131 = 231,231,000

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


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