Q: What are the prime factors of the number 54,912?

 A: 2, 3, 11, 13

Why are those the prime factors of the number 54,912?

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 54,912

54,912
Factor Arrows
227,456
Factor Arrows
213,728
Factor Arrows
26,864
Factor Arrows
23,432
Factor Arrows
21,716
Factor Arrows
2858
Factor Arrows
2429
Factor Arrows
3143
Factor Arrows
1113

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, 11, 13

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 2 x 3 x 11 x 13 = 54,912

This can also be written as 27 x 31 x 111 x 131 = 54,912

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


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