Q: What are the prime factors of the number 205,535,616?

 A: 2, 3, 11, 13, 19, 197

Why are those the prime factors of the number 205,535,616?

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 205,535,616

205,535,616
Factor Arrows
2102,767,808
Factor Arrows
251,383,904
Factor Arrows
225,691,952
Factor Arrows
212,845,976
Factor Arrows
26,422,988
Factor Arrows
23,211,494
Factor Arrows
21,605,747
Factor Arrows
3535,249
Factor Arrows
1148,659
Factor Arrows
133,743
Factor Arrows
19197

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, 11, 13, 19, 197

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 3 x 11 x 13 x 19 x 197 = 205,535,616

This can also be written as 27 x 31 x 111 x 131 x 191 x 1971 = 205,535,616

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


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