Q: What are the prime factors of the number 25,136,320?

 A: 2, 5, 11, 37, 193

Why are those the prime factors of the number 25,136,320?

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 25,136,320

25,136,320
Factor Arrows
212,568,160
Factor Arrows
26,284,080
Factor Arrows
23,142,040
Factor Arrows
21,571,020
Factor Arrows
2785,510
Factor Arrows
2392,755
Factor Arrows
578,551
Factor Arrows
117,141
Factor Arrows
37193

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, 37, 193

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 5 x 11 x 37 x 193 = 25,136,320

This can also be written as 26 x 51 x 111 x 371 x 1931 = 25,136,320

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


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