Q: What are the prime factors of the number 80,960?

 A: 2, 5, 11, 23

Why are those the prime factors of the number 80,960?

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 80,960

80,960
Factor Arrows
240,480
Factor Arrows
220,240
Factor Arrows
210,120
Factor Arrows
25,060
Factor Arrows
22,530
Factor Arrows
21,265
Factor Arrows
5253
Factor Arrows
1123

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, 5, 11, 23

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 5 x 11 x 23 = 80,960

This can also be written as 26 x 51 x 111 x 231 = 80,960

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


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