Q: What are the prime factors of the number 319,176?

 A: 2, 3, 11, 13, 31

Why are those the prime factors of the number 319,176?

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 319,176

319,176
Factor Arrows
2159,588
Factor Arrows
279,794
Factor Arrows
239,897
Factor Arrows
313,299
Factor Arrows
34,433
Factor Arrows
11403
Factor Arrows
1331

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, 11, 13, 31

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 11 x 13 x 31 = 319,176

This can also be written as 23 x 32 x 111 x 131 x 311 = 319,176

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


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