Q: What are the prime factors of the number 612,405?

 A: 3, 5, 31, 439

Why are those the prime factors of the number 612,405?

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 612,405

612,405
Factor Arrows
3204,135
Factor Arrows
368,045
Factor Arrows
513,609
Factor Arrows
31439

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, 31, 439

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 31 x 439 = 612,405

This can also be written as 32 x 51 x 311 x 4391 = 612,405

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


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