No numbers between 1 and 100 have exactly eleven factors. 60, 72, 84, 90 and 96 each have twelve factors.
25
6 and 8. 4 is a square, which can be considered as a special case of a rectangle.
Three numbers.
There are three of them with exactly five factors.
The sum of three and eleven is fourteen. This is calculated by simply adding the two numbers together: 3 + 11 = 14.
There is an infinite number of ways three numbers can have the sum of 11
Squares of prime numbers have only three factors.
nine, ten and eleven. Three consecutive numbers that total thirty
Composite numbers
There are three numbers that fit those requirements.
The numbers with only three factors are squares of prime numbers.
Numbers with exactly three factors are squares of prime numbers.