Q: What are the prime factors of the number 25,171,560?

 A: 2, 3, 5, 17, 457

Why are those the prime factors of the number 25,171,560?

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 25,171,560

25,171,560
Factor Arrows
212,585,780
Factor Arrows
26,292,890
Factor Arrows
23,146,445
Factor Arrows
31,048,815
Factor Arrows
3349,605
Factor Arrows
3116,535
Factor Arrows
338,845
Factor Arrows
57,769
Factor Arrows
17457

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, 5, 17, 457

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 3 x 3 x 5 x 17 x 457 = 25,171,560

This can also be written as 23 x 34 x 51 x 171 x 4571 = 25,171,560

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


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