import java.util.*;

class Main{
    public static void main(String[] args){
        int  x,y,z,c;
        Scanner in = new Scanner(System.in);
        x = in.nextInt();
        y = in.nextInt();
        z = in.nextInt();
        c = 0;
        while( x <= y ){
            if( z%x == 0){
                c = c + 1;
            }
            x = x + 1;
        }
        System.out.println(c);
    }
}
 
/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