public class Main {

	public static void main(String[] args) {
		 Scanner scan = new Scanner(System.in);

//???????????´??° a???b???c ??????????????????a ?????? b ?????§?????´??°?????????
//c ????´???°?????????????????????????±???????????????°????????????????????????????????????

	            int a = Integer.parseInt(scan.next());
	            int b = Integer.parseInt(scan.next());
	            int c = Integer.parseInt(scan.next());


	            int num = a ; //?¨??????¨
	            int count = 0; //count??????????????????

//a-b a???????????????????¶??????????

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

	            //???????????????????????°????¨???°
	            System.out.println(count);
	}

}