GMAT Maths: Counting the Divisors of Large Numbers (Video)

Learn how to quickly count the number of positive divisors of large numbers like 30,240. The video promotes understanding and retention, and will help you with your GMAT maths preparation.

If we want to determine the number of positive divisors of a small number like 24, we can easily list {1, 2, 3, 4, 6, 8, 12, 24} and count the divisors to see that we have 8 altogether. However, this listing and counting technique is unrealistic for large numbers like 14,000. In this video, you’ll learn how to quickly determine the number of positive divisors of any large number.