import java.util.Scanner;
class Main {
	
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		int numA = scanner.nextInt();
        int numB = scanner.nextInt();
        int numC = scanner.nextInt();
        int ans = 0;
        
        for (int val = numA;val <= numB;val++){
        	if(numC % val == 0) ans++;
        }	
        System.out.println(ans);	
	}	
}
/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