tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt in trackler-2.2.1.52 vs tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt in trackler-2.2.1.53

@@ -2,10 +2,10 @@
 enum class Classification {
     DEFICIENT, PERFECT, ABUNDANT
 }
 
 fun classify(naturalNumber: Int): Classification {
-    require(naturalNumber >= 0, { "$naturalNumber is not a natural number" })
+    require(naturalNumber > 0, { "$naturalNumber is not a natural number" })
 
     val aliquotSum = naturalNumber.aliquotSum()
     return when {
         aliquotSum == naturalNumber -> Classification.PERFECT
         aliquotSum > naturalNumber -> Classification.ABUNDANT