import java.util.Scanner;

public class Main {
	public static void main(String[] args){
                Scanner scan = new Scanner(System.in);
                int iNumA = scan.nextInt();
                int iNumB = scan.nextInt();
                int iNumC = scan.nextInt();
                int count = 0;
                for(int i=iNumA; i<=iNumB; i++){
                	if(iNumC%i == 0)
                		count++;
                }
                System.out.println(count);
	}
}
/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