// This program can print all factors of a number (a "fencepost loop")
// or count and return how many factors a number has.

public class Factors {
    public static void main(String[] args) {
        printFactors(24);
        printFactors(57);
        
        System.out.println(countFactors(24));
        System.out.println(countFactors(57));
    }
    
    // counts and returns the number of factors of the given integer
    public static int countFactors(int n) {
        int factors = 0;
        for (int i = 1; i <= n; i++) {
            if (n % i == 0) {   // a factor!
                factors++;
            }
        }
        
        return factors;
    }
    
    // prints the factors of the given integer separated by commas
    public static void printFactors(int n) {
        System.out.print("[");
        for (int i = 1; i <= n - 1; i++) {
            if (n % i == 0) {   // a factor!
                System.out.print(i + ", ");
            }
        }
        System.out.println(n + "]");
    }
}