Divisor function
= Divisor function
{wiki=Divisor_function}
The divisor function, often denoted as \\( d(n) \\) or \\( \\sigma_k(n) \\), is a function in number theory that counts or sums the divisors of a positive integer \\( n \\). 1. **Count of Divisors**: The most common version is \\( d(n) \\), which counts the total number of positive divisors of \\( n \\).