Q: What are the prime factors of the number 25,643,898?

 A: 2, 3, 7, 179, 379

Why are those the prime factors of the number 25,643,898?

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 25,643,898

25,643,898
Factor Arrows
212,821,949
Factor Arrows
34,273,983
Factor Arrows
31,424,661
Factor Arrows
3474,887
Factor Arrows
767,841
Factor Arrows
179379

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, 179, 379

We can check our work by multiplying all of the prime factors together: 2 x 3 x 3 x 3 x 7 x 179 x 379 = 25,643,898

This can also be written as 21 x 33 x 71 x 1791 x 3791 = 25,643,898

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


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