Q: What are the prime factors of the number 19,008?

 A: 2, 3, 11

Why are those the prime factors of the number 19,008?

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 19,008

19,008
Factor Arrows
29,504
Factor Arrows
24,752
Factor Arrows
22,376
Factor Arrows
21,188
Factor Arrows
2594
Factor Arrows
2297
Factor Arrows
399
Factor Arrows
333
Factor Arrows
311

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, 11

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 3 x 11 = 19,008

This can also be written as 26 x 33 x 111 = 19,008

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


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