1 is the only number between 1 and 100 that has too few factors to be a prime number.
There aren't any numbers between 1 and 100 with 16 factors.
1 has the fewest factors.
1
Since the factors of any number include 1 and the number itself, all of the factors 1 through 100 include every number from 1 to 100.
It is one of 5 numbers.
The maximum number of different factors is 12 and there are 5 numbers in 1-100 which have 12 factors.
None, 101 is a prime number and so has only 1 and itself as factors.
60, 72, 84, 90 and 96
Since 7 is a prime, 7*1 = 7, so that the only possibility for a number to have 7 factors is to have only one prime factor to the power of 6, because 7 = 1 + 6. 64 = 26 = 7 factors (6 + 1) (2 is the smallest prime number) Since 36 > 100, then 64 is the only number between 0 and 100 that have 7 factors.
1, 4, 9, 16, 25, 36, 49, 64, 81, 100
60, 72, 84, 90 and 96 each have twelve factors.