Q: What are the prime factors of the number 12,129,556?

 A: 2, 23, 31, 4253

Why are those the prime factors of the number 12,129,556?

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 12,129,556

12,129,556
Factor Arrows
26,064,778
Factor Arrows
23,032,389
Factor Arrows
23131,843
Factor Arrows
314,253

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, 23, 31, 4253

We can check our work by multiplying all of the prime factors together: 2 x 2 x 23 x 31 x 4,253 = 12,129,556

This can also be written as 22 x 231 x 311 x 4,2531 = 12,129,556

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


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