Q: What are the prime factors of the number 312,240?

 A: 2, 3, 5, 1301

Why are those the prime factors of the number 312,240?

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 312,240

312,240
Factor Arrows
2156,120
Factor Arrows
278,060
Factor Arrows
239,030
Factor Arrows
219,515
Factor Arrows
36,505
Factor Arrows
51,301

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, 5, 1301

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 3 x 5 x 1,301 = 312,240

This can also be written as 24 x 31 x 51 x 1,3011 = 312,240

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


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