Q: What are the prime factors of the number 164,160?

 A: 2, 3, 5, 19

Why are those the prime factors of the number 164,160?

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 164,160

164,160
Factor Arrows
282,080
Factor Arrows
241,040
Factor Arrows
220,520
Factor Arrows
210,260
Factor Arrows
25,130
Factor Arrows
22,565
Factor Arrows
3855
Factor Arrows
3285
Factor Arrows
395
Factor Arrows
519

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, 5, 19

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 3 x 3 x 5 x 19 = 164,160

This can also be written as 26 x 33 x 51 x 191 = 164,160

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


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