Q: What are the prime factors of the number 169,120?

 A: 2, 5, 7, 151

Why are those the prime factors of the number 169,120?

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 169,120

169,120
Factor Arrows
284,560
Factor Arrows
242,280
Factor Arrows
221,140
Factor Arrows
210,570
Factor Arrows
25,285
Factor Arrows
51,057
Factor Arrows
7151

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, 151

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 151 = 169,120

This can also be written as 25 x 51 x 71 x 1511 = 169,120

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


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