Q: What are the prime factors of the number 256,361,460?

 A: 2, 3, 5, 109, 39199

Why are those the prime factors of the number 256,361,460?

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 256,361,460

256,361,460
Factor Arrows
2128,180,730
Factor Arrows
264,090,365
Factor Arrows
321,363,455
Factor Arrows
54,272,691
Factor Arrows
10939,199

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, 109, 39199

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 109 x 39,199 = 256,361,460

This can also be written as 22 x 31 x 51 x 1091 x 39,1991 = 256,361,460

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


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