There are 57 such numbers.
Infinate
The positive integers up to 4 are: 1, 2, 3, and 4. This is a total of four positive integers.
There are 3,333 multiples of three that fall between 1 and 10,000.
128!
There are 457 such numbers.
10
There are 67 multiples of 6 and 50 multiples of 8 in that range. Their total, 117, will include numbers that are both.
LCM of 3 and 7 under 40 is 21
10
10 of them.
Ten of them.
They are the infinitely many integers of the form 322*n where n is any integer.