Q: What are the prime factors of the number 167,872?

 A: 2, 43, 61

Why are those the prime factors of the number 167,872?

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 167,872

167,872
Factor Arrows
283,936
Factor Arrows
241,968
Factor Arrows
220,984
Factor Arrows
210,492
Factor Arrows
25,246
Factor Arrows
22,623
Factor Arrows
4361

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, 43, 61

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 43 x 61 = 167,872

This can also be written as 26 x 431 x 611 = 167,872

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


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