Q: What are the prime factors of the number 256,203,072?

 A: 2, 3, 23, 83, 233

Why are those the prime factors of the number 256,203,072?

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 256,203,072

256,203,072
Factor Arrows
2128,101,536
Factor Arrows
264,050,768
Factor Arrows
232,025,384
Factor Arrows
216,012,692
Factor Arrows
28,006,346
Factor Arrows
24,003,173
Factor Arrows
31,334,391
Factor Arrows
3444,797
Factor Arrows
2319,339
Factor Arrows
83233

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, 23, 83, 233

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 3 x 3 x 23 x 83 x 233 = 256,203,072

This can also be written as 26 x 32 x 231 x 831 x 2331 = 256,203,072

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


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