Q: What are the prime factors of the number 172,224?

 A: 2, 3, 13, 23

Why are those the prime factors of the number 172,224?

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 172,224

172,224
Factor Arrows
286,112
Factor Arrows
243,056
Factor Arrows
221,528
Factor Arrows
210,764
Factor Arrows
25,382
Factor Arrows
22,691
Factor Arrows
3897
Factor Arrows
3299
Factor Arrows
1323

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, 13, 23

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 13 x 23 = 172,224

This can also be written as 26 x 32 x 131 x 231 = 172,224

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


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