Definition:Divisor Sum Function/Also defined as

Divisor Sum Function: Also defined as

Some sources define the divisor sum function of $n$ as the aliquot sum of $n$, that is, sum of the proper divisors of $n$.

Sources

• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): sigma function