Q: What are the prime factors of the number 3,268,864?

 A: 2, 113

Why are those the prime factors of the number 3,268,864?

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 3,268,864

3,268,864
Factor Arrows
21,634,432
Factor Arrows
2817,216
Factor Arrows
2408,608
Factor Arrows
2204,304
Factor Arrows
2102,152
Factor Arrows
251,076
Factor Arrows
225,538
Factor Arrows
212,769
Factor Arrows
113113

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, 113

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 113 x 113 = 3,268,864

This can also be written as 28 x 1132 = 3,268,864

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


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