var x = require('fs').readFileSync('/dev/stdin', 'utf8');

var array = x.split(" ").map(Number);

var a = array[0];
var b = array[1];
var c = array[2];

var count = 0;

for ( var i = a; i <= b; i++) {
    if(c % i === 0) count++;
}

console.log(count);

