Q: What are the prime factors of the number 105,792?

 A: 2, 3, 19, 29

Why are those the prime factors of the number 105,792?

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 105,792

105,792
Factor Arrows
252,896
Factor Arrows
226,448
Factor Arrows
213,224
Factor Arrows
26,612
Factor Arrows
23,306
Factor Arrows
21,653
Factor Arrows
3551
Factor Arrows
1929

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, 19, 29

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 19 x 29 = 105,792

This can also be written as 26 x 31 x 191 x 291 = 105,792

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


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