Q: What are the prime factors of the number 25,561,641?

 A: 3, 7, 157, 7753

Why are those the prime factors of the number 25,561,641?

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 25,561,641

25,561,641
Factor Arrows
38,520,547
Factor Arrows
71,217,221
Factor Arrows
1577,753

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, 7, 157, 7753

We can check our work by multiplying all of the prime factors together: 3 x 7 x 157 x 7,753 = 25,561,641

This can also be written as 31 x 71 x 1571 x 7,7531 = 25,561,641

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


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