import java.util.Scanner;

public class Main{
	public static void main(String args[]){

		Scanner sc = new Scanner(System.in);
		int intA = sc.nextInt();
		int intB = sc.nextInt();
		int intC = sc.nextInt();
		int intKosuu = 0;

		for(int i = intA; i <= intB; i++){

			if(intC % i == 0){
				intKosuu++;
			}
		}

		System.out.println(intKosuu);
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz