Q: What are the prime factors of the number 25,581,177?

 A: 3, 313, 1009

Why are those the prime factors of the number 25,581,177?

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 25,581,177

25,581,177
Factor Arrows
38,527,059
Factor Arrows
32,842,353
Factor Arrows
3947,451
Factor Arrows
3315,817
Factor Arrows
3131,009

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, 313, 1009

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 313 x 1,009 = 25,581,177

This can also be written as 34 x 3131 x 1,0091 = 25,581,177

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


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