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-2.2.1.58	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.57	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.56	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.55	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.54	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt
trackler-2.2.1.53	tracks/kotlin/exercises/perfect-numbers/.meta/src/reference/kotlin/NaturalNumber.kt