Q: What are the prime factors of the number 25,390,624?

 A: 2, 7, 16193

Why are those the prime factors of the number 25,390,624?

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 25,390,624

25,390,624
Factor Arrows
212,695,312
Factor Arrows
26,347,656
Factor Arrows
23,173,828
Factor Arrows
21,586,914
Factor Arrows
2793,457
Factor Arrows
7113,351
Factor Arrows
716,193

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, 7, 16193

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 7 x 16,193 = 25,390,624

This can also be written as 25 x 72 x 16,1931 = 25,390,624

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


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