Q: What are the prime factors of the number 123,122,240?

 A: 2, 5, 384757

Why are those the prime factors of the number 123,122,240?

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 123,122,240

123,122,240
Factor Arrows
261,561,120
Factor Arrows
230,780,560
Factor Arrows
215,390,280
Factor Arrows
27,695,140
Factor Arrows
23,847,570
Factor Arrows
21,923,785
Factor Arrows
5384,757

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, 5, 384757

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 5 x 384,757 = 123,122,240

This can also be written as 26 x 51 x 384,7571 = 123,122,240

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


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