This concept showed up 13 times this year--most often before question # 30, at the median spot of question # 27. These problems can be solved in at least 3 ways, but I will show you only the one that is the quickest for numbers with many divisors.
Number Dojo Level: 182
I am going to break down this concept a little bit because it sounds more complicated than it really is:
- Positive: greater than zero
- Integral: being an integer (whole number)
- Divisor: factor (divides evenly into the given number)
How to Solve:
This is easier to see with a few examples, so here we go:
Example 1: The number of positive integral divisors of 64 is ___
Example 2: 45 has ___ positive integral divisors.
Example 3: The number of positive integral divisors of 48 is ___
Example 4: 60 has ___ positive integral divisors.
Example 5: 24 has how many integral divisors? ___