Each of the 25 prime numbers from 1 to 100 has exactly two factors, 1 and the number itself. The other 75 numbers from 1 to 100 are not prime numbers because none of them have exactly two factors.
Excluding 1, a factor of all whole numbers, use the 1st 7 prime numbers greater than 100 and multiply them together.101 x 103 x 107 x etcorAny prime number (except 2) to the 6th power has exactly seven factors, like 729 and 15625.
In that range, only 100 has exactly 9 factors.
4, 9, 25 and 49.
prime squares 4, 9, 25, 49
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
Each of the 25 prime numbers from 1 to 100 has exactly two factors, 1 and the number itself. The other 75 numbers from 1 to 100 are not prime numbers because none of them have exactly two factors.
No numbers between 1 and 100 have exactly eleven factors. 60, 72, 84, 90 and 96 each have twelve factors.
Any prime number (except 2 and 3) to the 4th power, like 625 and 2401.
Excluding 1, a factor of all whole numbers, use the 1st 7 prime numbers greater than 100 and multiply them together.101 x 103 x 107 x etcorAny prime number (except 2) to the 6th power has exactly seven factors, like 729 and 15625.
There are five numbers in that range with 12 factors, but none with exactly eleven.
In that range, only 100 has exactly 9 factors.
4, 9, 25 and 49.
Numbers having exactly three factors are the squares of prime numbers. Examples of these numbers greater than 100 are 121, 169, 289, 361, 529, 841, etc.
Just 36.
16 and 81 are the only two.
prime squares 4, 9, 25, 49