Given an amicable pair , the quantity
(1)
| |||
(2)
| |||
(3)
|
is called the pair sum, where is the divisor function and is the restricted divisor function.
Given an amicable pair , the quantity
(1)
| |||
(2)
| |||
(3)
|
is called the pair sum, where is the divisor function and is the restricted divisor function.
Weisstein, Eric W. "Pair Sum." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/PairSum.html