Q: What are the prime factors of the number 648,192?

 A: 2, 3, 211

Why are those the prime factors of the number 648,192?

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 648,192

648,192
Factor Arrows
2324,096
Factor Arrows
2162,048
Factor Arrows
281,024
Factor Arrows
240,512
Factor Arrows
220,256
Factor Arrows
210,128
Factor Arrows
25,064
Factor Arrows
22,532
Factor Arrows
21,266
Factor Arrows
2633
Factor Arrows
3211

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, 211

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 2 x 3 x 211 = 648,192

This can also be written as 210 x 31 x 2111 = 648,192

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


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