Q: What are the prime factors of the number 22,245,216?

 A: 2, 3, 7, 4729

Why are those the prime factors of the number 22,245,216?

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 22,245,216

22,245,216
Factor Arrows
211,122,608
Factor Arrows
25,561,304
Factor Arrows
22,780,652
Factor Arrows
21,390,326
Factor Arrows
2695,163
Factor Arrows
3231,721
Factor Arrows
733,103
Factor Arrows
74,729

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, 7, 4729

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 7 x 4,729 = 22,245,216

This can also be written as 25 x 31 x 72 x 4,7291 = 22,245,216

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


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