Q: What are the prime factors of the number 25,661,680?

 A: 2, 5, 11, 241

Why are those the prime factors of the number 25,661,680?

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 25,661,680

25,661,680
Factor Arrows
212,830,840
Factor Arrows
26,415,420
Factor Arrows
23,207,710
Factor Arrows
21,603,855
Factor Arrows
5320,771
Factor Arrows
1129,161
Factor Arrows
112,651
Factor Arrows
11241

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, 11, 241

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 5 x 11 x 11 x 11 x 241 = 25,661,680

This can also be written as 24 x 51 x 113 x 2411 = 25,661,680

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


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