Q: What are the prime factors of the number 25,331,152?

 A: 2, 7, 11, 29, 709

Why are those the prime factors of the number 25,331,152?

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 25,331,152

25,331,152
Factor Arrows
212,665,576
Factor Arrows
26,332,788
Factor Arrows
23,166,394
Factor Arrows
21,583,197
Factor Arrows
7226,171
Factor Arrows
1120,561
Factor Arrows
29709

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, 11, 29, 709

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 7 x 11 x 29 x 709 = 25,331,152

This can also be written as 24 x 71 x 111 x 291 x 7091 = 25,331,152

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


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