Contents

enum class Classification {
    DEFICIENT, PERFECT, ABUNDANT
}

fun classify(naturalNumber: Int): Classification {
    require(naturalNumber > 0, { "$naturalNumber is not a natural number" })

    val aliquotSum = naturalNumber.aliquotSum()
    return when {
        aliquotSum == naturalNumber -> Classification.PERFECT
        aliquotSum > naturalNumber -> Classification.ABUNDANT
        else -> Classification.DEFICIENT
    }
}

fun Int.aliquotSum(): Int = (1 until this).filter { this % it == 0 }.sum()

Version data entries

126 entries across 126 versions & 1 rubygems

Version	Path
trackler-2.2.1.119	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.118	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.117	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.116	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.115	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.114	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.113	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.111	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.110	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.109	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.108	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.107	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.106	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.105	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.104	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.103	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.102	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.101	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.100	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.99	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt