Q: What are the prime factors of the number 123,524,544?

 A: 2, 3, 11, 13, 409

Why are those the prime factors of the number 123,524,544?

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 123,524,544

123,524,544
Factor Arrows
261,762,272
Factor Arrows
230,881,136
Factor Arrows
215,440,568
Factor Arrows
27,720,284
Factor Arrows
23,860,142
Factor Arrows
21,930,071
Factor Arrows
3643,357
Factor Arrows
1158,487
Factor Arrows
115,317
Factor Arrows
13409

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, 11, 13, 409

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 3 x 11 x 11 x 13 x 409 = 123,524,544

This can also be written as 26 x 31 x 112 x 131 x 4091 = 123,524,544

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


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