Q: What are the prime factors of the number 9,225,216?

 A: 2, 3, 7, 11, 13

Why are those the prime factors of the number 9,225,216?

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 9,225,216

9,225,216
Factor Arrows
24,612,608
Factor Arrows
22,306,304
Factor Arrows
21,153,152
Factor Arrows
2576,576
Factor Arrows
2288,288
Factor Arrows
2144,144
Factor Arrows
272,072
Factor Arrows
236,036
Factor Arrows
218,018
Factor Arrows
29,009
Factor Arrows
33,003
Factor Arrows
31,001
Factor Arrows
7143
Factor Arrows
1113

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, 11, 13

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 2 x 2 x 3 x 3 x 7 x 11 x 13 = 9,225,216

This can also be written as 210 x 32 x 71 x 111 x 131 = 9,225,216

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


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