Q: What are the prime factors of the number 169,824?

 A: 2, 3, 29, 61

Why are those the prime factors of the number 169,824?

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 169,824

169,824
Factor Arrows
284,912
Factor Arrows
242,456
Factor Arrows
221,228
Factor Arrows
210,614
Factor Arrows
25,307
Factor Arrows
31,769
Factor Arrows
2961

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, 29, 61

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 29 x 61 = 169,824

This can also be written as 25 x 31 x 291 x 611 = 169,824

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


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