Q: What are the prime factors of the number 108,432?

 A: 2, 3, 251

Why are those the prime factors of the number 108,432?

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 108,432

108,432
Factor Arrows
254,216
Factor Arrows
227,108
Factor Arrows
213,554
Factor Arrows
26,777
Factor Arrows
32,259
Factor Arrows
3753
Factor Arrows
3251

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, 251

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 3 x 3 x 251 = 108,432

This can also be written as 24 x 33 x 2511 = 108,432

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


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