Q: What are the prime factors of the number 2,256,128?

 A: 2, 7, 1259

Why are those the prime factors of the number 2,256,128?

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 2,256,128

2,256,128
Factor Arrows
21,128,064
Factor Arrows
2564,032
Factor Arrows
2282,016
Factor Arrows
2141,008
Factor Arrows
270,504
Factor Arrows
235,252
Factor Arrows
217,626
Factor Arrows
28,813
Factor Arrows
71,259

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, 1259

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 2 x 2 x 7 x 1,259 = 2,256,128

This can also be written as 28 x 71 x 1,2591 = 2,256,128

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


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