function Main(input) {
  let args = input
    .trim()
    .split(" ")
    .map((x) => parseInt(x, 10));
  let a = args[0];
  let b = args[1];
  let c = args[2];

  let ans = 0;
  for (let x = a; x <= b; x++) {
    if (c % x === 0) {
      ans++;
    }
  }
  console.log(ans);
}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));
