Q: What are the prime factors of the number 1,118,385?

 A: 3, 5, 29, 857

Why are those the prime factors of the number 1,118,385?

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 1,118,385

1,118,385
Factor Arrows
3372,795
Factor Arrows
3124,265
Factor Arrows
524,853
Factor Arrows
29857

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, 29, 857

We can check our work by multiplying all of the prime factors together: 3 x 3 x 5 x 29 x 857 = 1,118,385

This can also be written as 32 x 51 x 291 x 8571 = 1,118,385

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


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