Q: What are the prime factors of the number 3,996,928?

 A: 2, 13, 1201

Why are those the prime factors of the number 3,996,928?

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 3,996,928

3,996,928
Factor Arrows
21,998,464
Factor Arrows
2999,232
Factor Arrows
2499,616
Factor Arrows
2249,808
Factor Arrows
2124,904
Factor Arrows
262,452
Factor Arrows
231,226
Factor Arrows
215,613
Factor Arrows
131,201

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, 13, 1201

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 13 x 1,201 = 3,996,928

This can also be written as 28 x 131 x 1,2011 = 3,996,928

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


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