Q: What are the prime factors of the number 605,685?

 A: 3, 5, 149, 271

Why are those the prime factors of the number 605,685?

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 605,685

605,685
Factor Arrows
3201,895
Factor Arrows
540,379
Factor Arrows
149271

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:

3, 5, 149, 271

We can check our work by multiplying all of the prime factors together: 3 x 5 x 149 x 271 = 605,685

This can also be written as 31 x 51 x 1491 x 2711 = 605,685

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


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