Q: What are the prime factors of the number 361,760?

 A: 2, 5, 7, 17, 19

Why are those the prime factors of the number 361,760?

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 361,760

361,760
Factor Arrows
2180,880
Factor Arrows
290,440
Factor Arrows
245,220
Factor Arrows
222,610
Factor Arrows
211,305
Factor Arrows
52,261
Factor Arrows
7323
Factor Arrows
1719

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, 7, 17, 19

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 5 x 7 x 17 x 19 = 361,760

This can also be written as 25 x 51 x 71 x 171 x 191 = 361,760

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


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