Q: What are the prime factors of the number 119,808?

 A: 2, 3, 13

Why are those the prime factors of the number 119,808?

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 119,808

119,808
Factor Arrows
259,904
Factor Arrows
229,952
Factor Arrows
214,976
Factor Arrows
27,488
Factor Arrows
23,744
Factor Arrows
21,872
Factor Arrows
2936
Factor Arrows
2468
Factor Arrows
2234
Factor Arrows
2117
Factor Arrows
339
Factor Arrows
313

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, 13

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 2 x 2 x 2 x 2 x 3 x 3 x 13 = 119,808

This can also be written as 210 x 32 x 131 = 119,808

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


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