Data commit

Task/Erd-s-Nicolas-numbers/Java/erd-s-nicolas-numbers.java

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+import java.util.Arrays;
+
+public final class ErdosNicolasNumbers {
+
+	public static void main(String[] aArgs) {
+		final int limit = 100_000_000;
+		
+	    int[] divisorSum = new int[limit + 1];
+	    int[] divisorCount = new int[limit + 1];
+	    Arrays.fill(divisorSum, 1);
+	    Arrays.fill(divisorCount, 1);
+	
+	    for ( int index = 2; index <= limit / 2; index++ ) {
+	        for ( int number = 2 * index; number <= limit; number += index ) {
+	            if ( divisorSum[number] == number ) {
+	                System.out.println(String.format("%8d", number) + " equals the sum of its first "
+	                	             + String.format("%3d", divisorCount[number]) + " divisors");
+	            }
+	
+	            divisorSum[number] += index;
+	            divisorCount[number]++;
+	        }
+	    }
+	}
+
+}