Q: What are the prime factors of the number 216,576?

 A: 2, 3, 47

Why are those the prime factors of the number 216,576?

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 216,576

216,576
Factor Arrows
2108,288
Factor Arrows
254,144
Factor Arrows
227,072
Factor Arrows
213,536
Factor Arrows
26,768
Factor Arrows
23,384
Factor Arrows
21,692
Factor Arrows
2846
Factor Arrows
2423
Factor Arrows
3141
Factor Arrows
347

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, 47

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 2 x 2 x 3 x 3 x 47 = 216,576

This can also be written as 29 x 32 x 471 = 216,576

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


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