import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        String blank = " ";
        String data[] = br.readLine().split(blank);
        int a = Integer.parseInt(data[0]);
        int b = Integer.parseInt(data[1]);
        int c = Integer.parseInt(data[2]);
        
        int i = 0;
        for (int l = 0; a + l <= b; l++){
            if(c % (a + l) == 0){
                i++;
            }
        }
        System.out.println(i);
    }
}
/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