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Divisor functionAliquot sumMultiplicative functionPerfect totient numberDigit sumInteger factorizationPerfect numberQuotient ruleAliquot sequenceDivisorHarmonic numberSum-product numberSquared triangular numberDifferential operatorEuler summationAlgebraic fractionRiemann sumSummationDerivationSylvester's sequencePartitionMultinomial theoremConvergent seriesAlgebraic functionEuler's criterionPolynomial expansionPartition functionArithmetic seriesDifference of two squaresIntegro-differential equationGauss sumFunctional calculusDeterminantDirichlet convolutionChain ruleClass number formulaDistribution functionGreatest common divisorAlgebraic integerNumber theoryPower ruleSum of two squares theoremRestricted sumsetPractical numberDivisibility sequenceInteger factorization recordsCompositionEuler's totient functionAdditive number theorySymmetric derivativeEuler productSuperparticular numberTrigonometric substitutionAdditive inverseQuotientRamanujan's sumPartial sumAbel's theoremFactor theoremDifferential equationSpecial number field sieveLocally integrable functionReciprocal ruleDifferentiation rulesRational numberDirect sumStrang splittingTaylor seriesSummation methodIntegral equationGeometric seriesPrime number theoremEuler's factorization methodFunction compositionInverse function ruleSemiprimeDefinite integralP-adic valuationDifferintegralAbundant numberOutline of calculusOperator product expansionLogarithmic derivativeFermat's little theoremArgument of a functionNumber-theoretic functionGeometry of numbersFixed-point iterationTrinomial expansionMatrix splittingCardinalityPrime-counting functionDeficient numberAlgebraic number theoryCommon denominatorQuadratic gauss sumSquare triangular numberGaussian integerInclusion functionDivision algorithm