Q: What are the prime factors of the number 65,280,768?

 A: 2, 3, 7, 12143

Why are those the prime factors of the number 65,280,768?

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 65,280,768

65,280,768
Factor Arrows
232,640,384
Factor Arrows
216,320,192
Factor Arrows
28,160,096
Factor Arrows
24,080,048
Factor Arrows
22,040,024
Factor Arrows
21,020,012
Factor Arrows
2510,006
Factor Arrows
2255,003
Factor Arrows
385,001
Factor Arrows
712,143

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, 7, 12143

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 3 x 7 x 12,143 = 65,280,768

This can also be written as 28 x 31 x 71 x 12,1431 = 65,280,768

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


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