4 of them.
Chat with our AI personalities
19 numbers.
64
There are two perfect numbers, 6 and 28, that are less than 100.
Four. 13 = 1 23 = 8 33 = 27 43 = 64
'from 100' ??? If you mean 'less than 100' then there are 25 primes. If you mean 'more than 100' then the answer is infinite, just like numbers are infinite.