25
The answer is 25 because it has the factors 1,5,25! :)
The square of any prime number has exactly three factors: 22, 32, 52, etc.
I found 105,63 and 27
How about 30 or 105
The smallest number that has exactly three factors is 4.
49 has exactly 3 factors (1, 7, and 49) and is greater than 40 and less than 60.
25
The answer is 25 because it has the factors 1,5,25! :)
The square of any prime number has exactly three factors: 22, 32, 52, etc.
4, 9, 25
27
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
105 is one such number.
I found 105,63 and 27
How about 30 or 105
Numbers with exactly 6 factors are perfect squares of prime numbers. The prime factorization of a number with exactly 6 factors is in the form ( p^2 ), where ( p ) is a prime number. There are 10 prime numbers less than 30: 2, 3, 5, 7, 11, 13, 17, 19, 23, and 29. So, there are 10 numbers less than 30 that have exactly 6 factors.