Q: What are the prime factors of the number 173,376?

 A: 2, 3, 7, 43

Why are those the prime factors of the number 173,376?

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 173,376

173,376
Factor Arrows
286,688
Factor Arrows
243,344
Factor Arrows
221,672
Factor Arrows
210,836
Factor Arrows
25,418
Factor Arrows
22,709
Factor Arrows
3903
Factor Arrows
3301
Factor Arrows
743

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, 7, 43

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 7 x 43 = 173,376

This can also be written as 26 x 32 x 71 x 431 = 173,376

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


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