Find all the factors of 49.
Factors:
A factor of a given number is a number that divides the given number exactly.
Since, each of the numbers 1,7 and 49 divides 49 exactly.
So, 1,7 and 49 are the factors of 49.
Find all the factors of 21.
Find all the factors of 63.
If 49 A and A49, where A > 0, have a common factor, find all possible values of A.