'use strict';
(function(stdin) {
  var lines  = stdin.toString().split('\n');
  var param = lines[0].split(' ').map(Number);
  var result = (function(a,b,c) {
    var count = 0;
    for (var i = a; i < b + 1; i++){
        if (c % i === 0) count++;
    }
    return count;
  }(param[0],param[1],param[2]
  ));
  console.log(result);
}(require('fs').readFileSync('/dev/stdin', 'utf8')));