There's an infinite list of numbers that can do that,
such as 1/2, 1/3, 1/4, 1/5, 1.75, 3.5, etc.
The only positive whole numbers that can do it are 1 and 7 .
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1, 3, 7, 9, 21, 63
3 goes into 36 and 63 evenly.
1, 3 and 9.
63 will divide any multiple of 63, that is, any number of the form 63*k where k is an integer.
It is any members of the infinite set of numbers of the form 63*k where k is an integer. Since the set is infinite, it is not possible to list them.