import java.util.Scanner;

public class Main{

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);
int p = scan.nextInt();
int q = scan.nextInt();
int w = scan.nextInt();
int counter = 0;
for (int i = p; i <= q;  i ++ ) {
if ( w % i == 0) {
counter++;
}
}
System.out.println(counter);

}
}


/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