Byang is going to join a new school. His new class has $N$ students.

Each of the students are identified by their roll numbers starting from 1 to $N$. Byang is going to get the next roll number in the sequence.

Byang plans to make friends with only those whose roll numbers are a divisor of his roll number.

Can you help Byang count how many friends he will make?

The input will contain an integer $N$ ($0 < N < 1000000$).

Print the number of friends Byang will make in his new class.