The sum of powers of even divisors of a number. It is the analog of the divisor function for even divisors only and is written . It is given simply in terms of the usual divisor function by
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The sum of powers of even divisors of a number. It is the analog of the divisor function for even divisors only and is written . It is given simply in terms of the usual divisor function by
(1)
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Weisstein, Eric W. "Even Divisor Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/EvenDivisorFunction.html