Q: What are the prime factors of the number 36,855?

 A: 3, 5, 7, 13

Why are those the prime factors of the number 36,855?

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 36,855

36,855
Factor Arrows
312,285
Factor Arrows
34,095
Factor Arrows
31,365
Factor Arrows
3455
Factor Arrows
591
Factor Arrows
713

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, 7, 13

We can check our work by multiplying all of the prime factors together: 3 x 3 x 3 x 3 x 5 x 7 x 13 = 36,855

This can also be written as 34 x 51 x 71 x 131 = 36,855

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


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