Q: What are the prime factors of the number 313,242,144?

 A: 2, 3, 1423, 2293

Why are those the prime factors of the number 313,242,144?

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 313,242,144

313,242,144
Factor Arrows
2156,621,072
Factor Arrows
278,310,536
Factor Arrows
239,155,268
Factor Arrows
219,577,634
Factor Arrows
29,788,817
Factor Arrows
33,262,939
Factor Arrows
1,4232,293

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, 1423, 2293

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 3 x 1,423 x 2,293 = 313,242,144

This can also be written as 25 x 31 x 1,4231 x 2,2931 = 313,242,144

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


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