Q: What are the prime factors of the number 320,100?

 A: 2, 3, 5, 11, 97

Why are those the prime factors of the number 320,100?

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 320,100

320,100
Factor Arrows
2160,050
Factor Arrows
280,025
Factor Arrows
326,675
Factor Arrows
55,335
Factor Arrows
51,067
Factor Arrows
1197

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, 11, 97

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 5 x 11 x 97 = 320,100

This can also be written as 22 x 31 x 52 x 111 x 971 = 320,100

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


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