import java.io.IOException;
import java.util.Scanner;
public class Main {
	public static void main(String[] args) throws IOException {
				
		Scanner sc = new Scanner(System.in);
         
            int a=sc.nextInt();
            int b=sc.nextInt();
            int c=sc.nextInt();
            
            int tmp=0;
            if(a>b){tmp=a;a=b;b=tmp;
            }int count=0;
            for(int i=a;i<=b;i++){
            	
            	if(c%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