Q: What are the prime factors of the number 120,263,605?

 A: 5, 7, 11, 239, 1307

Why are those the prime factors of the number 120,263,605?

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 120,263,605

120,263,605
Factor Arrows
524,052,721
Factor Arrows
73,436,103
Factor Arrows
11312,373
Factor Arrows
2391,307

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:

5, 7, 11, 239, 1307

We can check our work by multiplying all of the prime factors together: 5 x 7 x 11 x 239 x 1,307 = 120,263,605

This can also be written as 51 x 71 x 111 x 2391 x 1,3071 = 120,263,605

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


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