Q: What are the prime factors of the number 2,663,136?

 A: 2, 3, 7, 1321

Why are those the prime factors of the number 2,663,136?

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 2,663,136

2,663,136
Factor Arrows
21,331,568
Factor Arrows
2665,784
Factor Arrows
2332,892
Factor Arrows
2166,446
Factor Arrows
283,223
Factor Arrows
327,741
Factor Arrows
39,247
Factor Arrows
71,321

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, 7, 1321

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 1,321 = 2,663,136

This can also be written as 25 x 32 x 71 x 1,3211 = 2,663,136

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


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