Q: What are the prime factors of the number 25,251,317?

 A: 7, 13, 809

Why are those the prime factors of the number 25,251,317?

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 25,251,317

25,251,317
Factor Arrows
73,607,331
Factor Arrows
7515,333
Factor Arrows
773,619
Factor Arrows
710,517
Factor Arrows
13809

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, 13, 809

We can check our work by multiplying all of the prime factors together: 7 x 7 x 7 x 7 x 13 x 809 = 25,251,317

This can also be written as 74 x 131 x 8091 = 25,251,317

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


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