Q: What are the prime factors of the number 5,115,744?

 A: 2, 3, 31, 191

Why are those the prime factors of the number 5,115,744?

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 5,115,744

5,115,744
Factor Arrows
22,557,872
Factor Arrows
21,278,936
Factor Arrows
2639,468
Factor Arrows
2319,734
Factor Arrows
2159,867
Factor Arrows
353,289
Factor Arrows
317,763
Factor Arrows
35,921
Factor Arrows
31191

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, 31, 191

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 3 x 3 x 31 x 191 = 5,115,744

This can also be written as 25 x 33 x 311 x 1911 = 5,115,744

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


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