output_description: Print the number of divisors in a line.
input_description: Three integers a, b and c are given in a line separated by a single space.
attempt: list = input().split()
  li_uniq = []
  for x in list:
      if x not in li_uniq:
          li_uniq.append(x)
  print(len(li_uniq))
  
problem_description: How Many Divisors?
  
  Write a program which reads three integers a, b and c, and prints the number
  of divisors of c between a and b.
samples: [{"input": "5 14 80", "output": "3"}]