Q: What are the prime factors of the number 123,266,688?

 A: 2, 3, 321007

Why are those the prime factors of the number 123,266,688?

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 123,266,688

123,266,688
Factor Arrows
261,633,344
Factor Arrows
230,816,672
Factor Arrows
215,408,336
Factor Arrows
27,704,168
Factor Arrows
23,852,084
Factor Arrows
21,926,042
Factor Arrows
2963,021
Factor Arrows
3321,007

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, 321007

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 3 x 321,007 = 123,266,688

This can also be written as 27 x 31 x 321,0071 = 123,266,688

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


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