Q: What are the prime factors of the number 220,256,784?

 A: 2, 3, 11, 12641

Why are those the prime factors of the number 220,256,784?

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 220,256,784

220,256,784
Factor Arrows
2110,128,392
Factor Arrows
255,064,196
Factor Arrows
227,532,098
Factor Arrows
213,766,049
Factor Arrows
34,588,683
Factor Arrows
31,529,561
Factor Arrows
11139,051
Factor Arrows
1112,641

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, 11, 12641

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 11 x 11 x 12,641 = 220,256,784

This can also be written as 24 x 32 x 112 x 12,6411 = 220,256,784

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


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