Number of divisors of an integer
This functionality does not run in MATLAB.
numlib::tau(n) returns the number of positive divisors of n.
numlib::tau(0) returns 0.
numlib::tau returns the function call with evaluated argument if the argument is not a number.
numlib::tau returns an error if the argument evaluates to a number of wrong type.
numlib::tau is the same function as numlib::numdivisors.
We compute the number of positive divisors of the number 6746328388800 (one of the highly composite numbers studied by S. Ramanujan in 1915):
Internally, ifactor is used for factoring n.