Q: What are the prime factors of the number 256,322,040?

 A: 2, 3, 5, 13, 164309

Why are those the prime factors of the number 256,322,040?

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 256,322,040

256,322,040
Factor Arrows
2128,161,020
Factor Arrows
264,080,510
Factor Arrows
232,040,255
Factor Arrows
310,680,085
Factor Arrows
52,136,017
Factor Arrows
13164,309

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, 5, 13, 164309

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 13 x 164,309 = 256,322,040

This can also be written as 23 x 31 x 51 x 131 x 164,3091 = 256,322,040

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


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