Q: What are the prime factors of the number 225,321,536?

 A: 2, 11, 17, 67, 281

Why are those the prime factors of the number 225,321,536?

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 225,321,536

225,321,536
Factor Arrows
2112,660,768
Factor Arrows
256,330,384
Factor Arrows
228,165,192
Factor Arrows
214,082,596
Factor Arrows
27,041,298
Factor Arrows
23,520,649
Factor Arrows
11320,059
Factor Arrows
1718,827
Factor Arrows
67281

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, 11, 17, 67, 281

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 11 x 17 x 67 x 281 = 225,321,536

This can also be written as 26 x 111 x 171 x 671 x 2811 = 225,321,536

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


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