Q: What are the prime factors of the number 25,131,666?

 A: 2, 3, 7, 163, 3671

Why are those the prime factors of the number 25,131,666?

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 25,131,666

25,131,666
Factor Arrows
212,565,833
Factor Arrows
34,188,611
Factor Arrows
7598,373
Factor Arrows
1633,671

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:

2, 3, 7, 163, 3671

We can check our work by multiplying all of the prime factors together: 2 x 3 x 7 x 163 x 3,671 = 25,131,666

This can also be written as 21 x 31 x 71 x 1631 x 3,6711 = 25,131,666

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


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