Q: What are the prime factors of the number 198,600?

 A: 2, 3, 5, 331

Why are those the prime factors of the number 198,600?

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 198,600

198,600
Factor Arrows
299,300
Factor Arrows
249,650
Factor Arrows
224,825
Factor Arrows
38,275
Factor Arrows
51,655
Factor Arrows
5331

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, 331

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 5 x 331 = 198,600

This can also be written as 23 x 31 x 52 x 3311 = 198,600

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


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