Q: What are the prime factors of the number 25,640,930?

 A: 2, 5, 7, 17, 29, 743

Why are those the prime factors of the number 25,640,930?

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 25,640,930

25,640,930
Factor Arrows
212,820,465
Factor Arrows
52,564,093
Factor Arrows
7366,299
Factor Arrows
1721,547
Factor Arrows
29743

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, 5, 7, 17, 29, 743

We can check our work by multiplying all of the prime factors together: 2 x 5 x 7 x 17 x 29 x 743 = 25,640,930

This can also be written as 21 x 51 x 71 x 171 x 291 x 7431 = 25,640,930

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


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