import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		}

	//End of Main class
} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		}

	//End of Main class
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		} main {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int startNumber = sc.nextInt(); startNumber sc.nextInt() sc.nextInt sc int endNumber = sc.nextInt(); endNumber sc.nextInt() sc.nextInt sc int divisor = sc.nextInt(); divisor sc.nextInt() sc.nextInt sc int lastlyDivisor = 0; lastlyDivisor 0 for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			} int i = startNumber; int i = startNumber; i startNumber endNumber >= i endNumber i i++ i++ i {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			} {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			} if(divisor % i == 0) {
					lastlyDivisor++;
				} divisor % i == 0 divisor % i divisor i 0 {
					lastlyDivisor++;
				} lastlyDivisor++ lastlyDivisor System.out.println(lastlyDivisor) System.out.println System.out System System.out lastlyDivisor String[] args args public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		}

	//End of Main class
} public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		}

	//End of Main class
} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		//Start of Main Method
			int startNumber = sc.nextInt();
			int endNumber = sc.nextInt();
			int divisor = sc.nextInt();

			int lastlyDivisor = 0;
			for(int i = startNumber; endNumber >= i;i++) {

				if(divisor % i == 0) {
					lastlyDivisor++;
				}

			}

			System.out.println(lastlyDivisor);


		//End of Main Method
		}

	//End of Main class
}
