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Problems

Number of divisors

Number of divisors

Time limit 1 second
Memory limit 128 MiB

The integer n is given. Find the number of its divisors, excluding divisors n and 1.

Input data

One positive integer n~(2 \le n \le 2^{31} - 1).

Output data

Print the number of divisors of n.

Examples

Input example #1
18
Output example #1
4