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