Q: What are the prime factors of the number 1,280,608?

 A: 2, 7, 5717

Why are those the prime factors of the number 1,280,608?

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 1,280,608

1,280,608
Factor Arrows
2640,304
Factor Arrows
2320,152
Factor Arrows
2160,076
Factor Arrows
280,038
Factor Arrows
240,019
Factor Arrows
75,717

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, 7, 5717

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 7 x 5,717 = 1,280,608

This can also be written as 25 x 71 x 5,7171 = 1,280,608

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


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