Q: What are the prime factors of the number 256,784,384?

 A: 2, 125383

Why are those the prime factors of the number 256,784,384?

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 256,784,384

256,784,384
Factor Arrows
2128,392,192
Factor Arrows
264,196,096
Factor Arrows
232,098,048
Factor Arrows
216,049,024
Factor Arrows
28,024,512
Factor Arrows
24,012,256
Factor Arrows
22,006,128
Factor Arrows
21,003,064
Factor Arrows
2501,532
Factor Arrows
2250,766
Factor Arrows
2125,383

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, 125383

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 2 x 2 x 2 x 125,383 = 256,784,384

This can also be written as 211 x 125,3831 = 256,784,384

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


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