Q: What are the prime factors of the number 25,581,825?

 A: 3, 5, 4211

Why are those the prime factors of the number 25,581,825?

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 25,581,825

25,581,825
Factor Arrows
38,527,275
Factor Arrows
32,842,425
Factor Arrows
3947,475
Factor Arrows
3315,825
Factor Arrows
3105,275
Factor Arrows
521,055
Factor Arrows
54,211

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, 5, 4211

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 5 x 5 x 4,211 = 25,581,825

This can also be written as 35 x 52 x 4,2111 = 25,581,825

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


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