Q: What are the prime factors of the number 206,132,640?

 A: 2, 3, 5, 7, 31, 1979

Why are those the prime factors of the number 206,132,640?

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 206,132,640

206,132,640
Factor Arrows
2103,066,320
Factor Arrows
251,533,160
Factor Arrows
225,766,580
Factor Arrows
212,883,290
Factor Arrows
26,441,645
Factor Arrows
32,147,215
Factor Arrows
5429,443
Factor Arrows
761,349
Factor Arrows
311,979

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, 5, 7, 31, 1979

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 5 x 7 x 31 x 1,979 = 206,132,640

This can also be written as 25 x 31 x 51 x 71 x 311 x 1,9791 = 206,132,640

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


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