Q: What are the prime factors of the number 1,296,768?

 A: 2, 3, 11, 307

Why are those the prime factors of the number 1,296,768?

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 1,296,768

1,296,768
Factor Arrows
2648,384
Factor Arrows
2324,192
Factor Arrows
2162,096
Factor Arrows
281,048
Factor Arrows
240,524
Factor Arrows
220,262
Factor Arrows
210,131
Factor Arrows
33,377
Factor Arrows
11307

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, 307

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 307 = 1,296,768

This can also be written as 27 x 31 x 111 x 3071 = 1,296,768

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


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