Q: What are the prime factors of the number 720,605,622?

 A: 2, 3, 11, 17, 359, 1789

Why are those the prime factors of the number 720,605,622?

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 720,605,622

720,605,622
Factor Arrows
2360,302,811
Factor Arrows
3120,100,937
Factor Arrows
1110,918,267
Factor Arrows
17642,251
Factor Arrows
3591,789

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, 17, 359, 1789

We can check our work by multiplying all of the prime factors together: 2 x 3 x 11 x 17 x 359 x 1,789 = 720,605,622

This can also be written as 21 x 31 x 111 x 171 x 3591 x 1,7891 = 720,605,622

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


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