Q: What are the prime factors of the number 5,424,320?

 A: 2, 5, 11, 23, 67

Why are those the prime factors of the number 5,424,320?

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 5,424,320

5,424,320
Factor Arrows
22,712,160
Factor Arrows
21,356,080
Factor Arrows
2678,040
Factor Arrows
2339,020
Factor Arrows
2169,510
Factor Arrows
284,755
Factor Arrows
516,951
Factor Arrows
111,541
Factor Arrows
2367

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, 5, 11, 23, 67

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 5 x 11 x 23 x 67 = 5,424,320

This can also be written as 26 x 51 x 111 x 231 x 671 = 5,424,320

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


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