Q: What are the prime factors of the number 181,760?

 A: 2, 5, 71

Why are those the prime factors of the number 181,760?

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 181,760

181,760
Factor Arrows
290,880
Factor Arrows
245,440
Factor Arrows
222,720
Factor Arrows
211,360
Factor Arrows
25,680
Factor Arrows
22,840
Factor Arrows
21,420
Factor Arrows
2710
Factor Arrows
2355
Factor Arrows
571

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, 71

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 5 x 71 = 181,760

This can also be written as 29 x 51 x 711 = 181,760

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


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