object Main {
  def main(args: Array[String]): Unit = {
    val abc = io.StdIn.readLine().split(" ").map(_.toInt)
    val a = abc(0)
    val b = abc(1)
    val c = abc(2)

    val selfDivisor = if (a <= c && c <= b) 1 else 0
    val count =
      Iterator.iterate(a)(i => i + 1)
        .takeWhile(i => i <= b && i <= c / 2)
        .count(c % _ == 0)

    println(count + selfDivisor)
  }
}