Q: What are the prime factors of the number 663,205,560?

 A: 2, 3, 5, 431, 12823

Why are those the prime factors of the number 663,205,560?

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 663,205,560

663,205,560
Factor Arrows
2331,602,780
Factor Arrows
2165,801,390
Factor Arrows
282,900,695
Factor Arrows
327,633,565
Factor Arrows
55,526,713
Factor Arrows
43112,823

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, 431, 12823

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 5 x 431 x 12,823 = 663,205,560

This can also be written as 23 x 31 x 51 x 4311 x 12,8231 = 663,205,560

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


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