All numbers of the from p2 where p is a prime. So 4, 9, 25 and 49.
All the rest have fewer or more.
1, 4, 9, 16, 25, 36, 49, 64, 81, 100 -- the square numbers.
The squares -- nine of them.
Divisors are whole numbers. The divisors of 100 between 1 and 10 are 1, 2, 4, 5 and 10.
The perfect numbers less than 100 are 6 and 28.
There are 25 prime numbers less than 100
the greatest prime numbers that is less than 100 = 97
There are 25 prime numbers less than 100
The product of the prime numbers less than 100 is 2.3055679639455188e+36
The total number of prime numbers less than 100 is 25.
The prime numbers less than 100 that contain an 8 are 83 and 89. So, there are two prime numbers that are less than 100 and contain an 8.
100
There are 25 numbers less than 100 that are prime. One is 17.