Q: What are the prime factors of the number 123,262,240?

 A: 2, 5, 17, 45317

Why are those the prime factors of the number 123,262,240?

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 123,262,240

123,262,240
Factor Arrows
261,631,120
Factor Arrows
230,815,560
Factor Arrows
215,407,780
Factor Arrows
27,703,890
Factor Arrows
23,851,945
Factor Arrows
5770,389
Factor Arrows
1745,317

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, 17, 45317

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 17 x 45,317 = 123,262,240

This can also be written as 25 x 51 x 171 x 45,3171 = 123,262,240

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


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