Q: What are the prime factors of the number 159,768?

 A: 2, 3, 7, 317

Why are those the prime factors of the number 159,768?

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 159,768

159,768
Factor Arrows
279,884
Factor Arrows
239,942
Factor Arrows
219,971
Factor Arrows
36,657
Factor Arrows
32,219
Factor Arrows
7317

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:

2, 3, 7, 317

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 7 x 317 = 159,768

This can also be written as 23 x 32 x 71 x 3171 = 159,768

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


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