Q: What are the prime factors of the number 31,122,304?

 A: 2, 19, 67, 191

Why are those the prime factors of the number 31,122,304?

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 31,122,304

31,122,304
Factor Arrows
215,561,152
Factor Arrows
27,780,576
Factor Arrows
23,890,288
Factor Arrows
21,945,144
Factor Arrows
2972,572
Factor Arrows
2486,286
Factor Arrows
2243,143
Factor Arrows
1912,797
Factor Arrows
67191

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, 19, 67, 191

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 2 x 19 x 67 x 191 = 31,122,304

This can also be written as 27 x 191 x 671 x 1911 = 31,122,304

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


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