Given a positive integer n, let t (n)denote the number of positive divisors
of n and s (n)denote the sum of these divisors.
Consider n = 12. Because 12 has for its divisors 1, 2, 3, 4, 6, and 12,
t (12) = 6 and s (12) = 1 + 2 + 3 + 4 + 6 + 12 = 28
Other examples are
t (1) = 1 t (2) = 2 t (3) = 2 t (4) = 3 t (5) = 2
and
s (1) = 1 s (2) = 3 s (3) = 4 s (4) = 7 s (5) = 6
To facilitate computation of t (n) and s (n), the following theorem is considered