Q: What are the prime factors of the number 31,440,024?

 A: 2, 3, 7, 11, 53, 107

Why are those the prime factors of the number 31,440,024?

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 31,440,024

31,440,024
Factor Arrows
215,720,012
Factor Arrows
27,860,006
Factor Arrows
23,930,003
Factor Arrows
31,310,001
Factor Arrows
3436,667
Factor Arrows
762,381
Factor Arrows
115,671
Factor Arrows
53107

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, 7, 11, 53, 107

We can check our work by multiplying all of the prime factors together: 2 x 2 x 2 x 3 x 3 x 7 x 11 x 53 x 107 = 31,440,024

This can also be written as 23 x 32 x 71 x 111 x 531 x 1071 = 31,440,024

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


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