Q: What are the prime factors of the number 25,516,431?

 A: 3, 167, 5659

Why are those the prime factors of the number 25,516,431?

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 25,516,431

25,516,431
Factor Arrows
38,505,477
Factor Arrows
32,835,159
Factor Arrows
3945,053
Factor Arrows
1675,659

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:

3, 167, 5659

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 167 x 5,659 = 25,516,431

This can also be written as 33 x 1671 x 5,6591 = 25,516,431

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


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