Q: What are the prime factors of the number 777,540?

 A: 2, 3, 5, 12959

Why are those the prime factors of the number 777,540?

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 777,540

777,540
Factor Arrows
2388,770
Factor Arrows
2194,385
Factor Arrows
364,795
Factor Arrows
512,959

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, 5, 12959

We can check our work by multiplying all of the prime factors together: 2 x 2 x 3 x 5 x 12,959 = 777,540

This can also be written as 22 x 31 x 51 x 12,9591 = 777,540

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


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