Initial data commit

Task/Proper-divisors/Sidef/proper-divisors.sidef

@@ -0,0 +1,19 @@
+func propdiv (n) {
+    n.divisors.slice(0, -2)
+}
+
+{|i| printf("%2d: %s\n", i, propdiv(i)) } << 1..10
+
+var max = 0
+var candidates = []
+
+for i in (1..20_000) {
+    var divs = propdiv(i).len
+    if (divs > max) {
+        candidates = []
+        max = divs
+    }
+    candidates << i if (divs == max)
+}
+
+say "max = #{max}, candidates = #{candidates}"