The numbers less than 100 with exactly 6 factors are of the form a2b where a and b are different primes.
12, 18, 20, 28, 44, 45, 50, 52, 63, 68, 75, 76, 92 and 99.
32
11
4, 9, 25, 49
less. One hundred and something is always less than three hundred and something.
6 (1,2,3,6) 10 (1,2,5,10) and 15 (1,3,5,15).
0, 1, 2, 3
49 has exactly 3 factors (1, 7, and 49) and is greater than 40 and less than 60.
24
25
By definition, a prime number has exactly two factors. So, there are no prime numbers with exactly three factors.
The answer is 25 because it has the factors 1,5,25! :)
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.
25
The smallest number that has exactly three factors is 4.
I guess it would be 45,63,75,99 they each have 6 factors
27
32