Four numbers less than thirty, 12, 18, 20, and 28, each have exactly 6 factors.
14 (I think).
there are 3 no.2,3 & 5
1, 2, 3, 5, and 7
Every prime number has exactly two factors. They are '1' and the number itself. There are 15 prime numbers less than 50. A few of them are 2, 3, 5, 7, 11, 13, and 47.
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.
4, 9, 25 and 49 They are squares of prime numbers.
11
Just 36.
14 (I think).
there are 3 no.2,3 & 5
1, 2, 3, 5, and 7
Every prime number has exactly two factors. They are '1' and the number itself. There are 15 prime numbers less than 50. A few of them are 2, 3, 5, 7, 11, 13, and 47.
4, 9, 25, and 49
4, 9, 25, 49
prime squares 4, 9, 25, 49
Nothing special. They are squares of prime numbers.