Q: What are the prime factors of the number 121,330,608?

 A: 2, 3, 7, 193, 1871

Why are those the prime factors of the number 121,330,608?

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 121,330,608

121,330,608
Factor Arrows
260,665,304
Factor Arrows
230,332,652
Factor Arrows
215,166,326
Factor Arrows
27,583,163
Factor Arrows
32,527,721
Factor Arrows
7361,103
Factor Arrows
1931,871

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, 193, 1871

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 7 x 193 x 1,871 = 121,330,608

This can also be written as 24 x 31 x 71 x 1931 x 1,8711 = 121,330,608

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


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