import java.util.Scanner;
public class Main {
    public static void main (String args[]){
    	Scanner str =new Scanner(System.in);
    	StringBuffer buf =new StringBuffer();
        int[] num={};
        int count =0;
        int sum =0;
    	    int a = str.nextInt();
    	    int b = str.nextInt();
    	    int c = str.nextInt();
    	    for (int i=1;i<= c;i++){
    	    	if(c%i==0){
    	    		if(a<=i&&i<=b){
    	    			sum++;
    	    		}
    	    	}
    	    }

    	System.out.println(sum);
    }
}
/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