Q: What are the prime factors of the number 19,488?

 A: 2, 3, 7, 29

Why are those the prime factors of the number 19,488?

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 19,488

19,488
Factor Arrows
29,744
Factor Arrows
24,872
Factor Arrows
22,436
Factor Arrows
21,218
Factor Arrows
2609
Factor Arrows
3203
Factor Arrows
729

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, 29

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 7 x 29 = 19,488

This can also be written as 25 x 31 x 71 x 291 = 19,488

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


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