Q: What are the prime factors of the number 25,517,760?

 A: 2, 3, 5, 19, 1399

Why are those the prime factors of the number 25,517,760?

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 25,517,760

25,517,760
Factor Arrows
212,758,880
Factor Arrows
26,379,440
Factor Arrows
23,189,720
Factor Arrows
21,594,860
Factor Arrows
2797,430
Factor Arrows
2398,715
Factor Arrows
3132,905
Factor Arrows
526,581
Factor Arrows
191,399

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, 19, 1399

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 5 x 19 x 1,399 = 25,517,760

This can also be written as 26 x 31 x 51 x 191 x 1,3991 = 25,517,760

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


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