Q: What are the prime factors of the number 256,208,288?

 A: 2, 7, 263, 4349

Why are those the prime factors of the number 256,208,288?

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 256,208,288

256,208,288
Factor Arrows
2128,104,144
Factor Arrows
264,052,072
Factor Arrows
232,026,036
Factor Arrows
216,013,018
Factor Arrows
28,006,509
Factor Arrows
71,143,787
Factor Arrows
2634,349

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, 263, 4349

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 263 x 4,349 = 256,208,288

This can also be written as 25 x 71 x 2631 x 4,3491 = 256,208,288

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


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