Q: What are the prime factors of the number 12,521,551?

 A: 7, 19, 31, 3037

Why are those the prime factors of the number 12,521,551?

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 12,521,551

12,521,551
Factor Arrows
71,788,793
Factor Arrows
1994,147
Factor Arrows
313,037

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:

7, 19, 31, 3037

We can check our work by multiplying all of the prime factors together: 7 x 19 x 31 x 3,037 = 12,521,551

This can also be written as 71 x 191 x 311 x 3,0371 = 12,521,551

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


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