The sum of the aliquot divisors of , given by
where is the divisor function. The first few values are 0, 1, 1, 3, 1, 6, 1, 7, 4, 8, 1, 16, ... (OEIS A001065).
The sum of the aliquot divisors of , given by
where is the divisor function. The first few values are 0, 1, 1, 3, 1, 6, 1, 7, 4, 8, 1, 16, ... (OEIS A001065).
Weisstein, Eric W. "Restricted Divisor Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/RestrictedDivisorFunction.html