tasks a-s

Task/Perfect-numbers/JavaScript/perfect-numbers.js

@@ -0,0 +1,21 @@
+function is_perfect(n)
+{
+ var sum = 1, i, sqrt=Math.floor(Math.sqrt(n));
+ for (i = sqrt-1; i>1; i--)
+ {
+  if (n % i == 0) {
+   sum += i + n/i;
+  }
+ }
+ if(n % sqrt == 0)
+  sum += sqrt + (sqrt*sqrt == n ? 0 : n/sqrt);
+ return sum === n;
+}
+
+
+var i;
+for (i = 1; i < 10000; i++)
+{
+ if (is_perfect(i))
+  print(i);
+}