Q: What are the prime factors of the number 31,130,304?

 A: 2, 3, 281, 577

Why are those the prime factors of the number 31,130,304?

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 31,130,304

31,130,304
Factor Arrows
215,565,152
Factor Arrows
27,782,576
Factor Arrows
23,891,288
Factor Arrows
21,945,644
Factor Arrows
2972,822
Factor Arrows
2486,411
Factor Arrows
3162,137
Factor Arrows
281577

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, 281, 577

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 2 x 2 x 2 x 3 x 281 x 577 = 31,130,304

This can also be written as 26 x 31 x 2811 x 5771 = 31,130,304

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


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