import java.util.Scanner;

public class Main{
    public static void main(String args[]){
	Scanner in = new Scanner(System.in);
	int a = in.nextInt();
	int b = in.nextInt();
        int c = in.nextInt();

	int cnt=0;
	for(int num = a; num<=b; num++){
	    if(c%num==0)cnt++;
	}
	System.out.println(cnt);
    }
}


/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