Q: What are the prime factors of the number 197,568?

 A: 2, 3, 7

Why are those the prime factors of the number 197,568?

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 197,568

197,568
Factor Arrows
298,784
Factor Arrows
249,392
Factor Arrows
224,696
Factor Arrows
212,348
Factor Arrows
26,174
Factor Arrows
23,087
Factor Arrows
31,029
Factor Arrows
3343
Factor Arrows
749
Factor Arrows
77

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

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 7 x 7 x 7 = 197,568

This can also be written as 26 x 32 x 73 = 197,568

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


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