Q: What are the prime factors of the number 1,681,317?

 A: 3, 11, 17, 37

Why are those the prime factors of the number 1,681,317?

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 1,681,317

1,681,317
Factor Arrows
3560,439
Factor Arrows
3186,813
Factor Arrows
362,271
Factor Arrows
320,757
Factor Arrows
36,919
Factor Arrows
11629
Factor Arrows
1737

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, 11, 17, 37

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 3 x 11 x 17 x 37 = 1,681,317

This can also be written as 35 x 111 x 171 x 371 = 1,681,317

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


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