EntityQ140744· pop 33· linked from 303 articlesarithmetic functionSign in to saveany function whose domain is the positive integers and whose range is a subset of the complex numbersConnectionsmodular formEntityprime numberEntityEuler's totient functionEntityfigurate numberEntityquadratic fieldEntityautomorphic numberEntityadditive functionEntityInternational Standard Book NumberEntitynatural numberEntitycomplex numberEntityfunctionEntitynumber theoryEntityWayback MachineEntitydigitEntitybinary numeral systemEntityexponentiationEntitynumeral systemEntityG.H. HardyEntitygreatest common divisorEntitythree-dimensional spaceEntityCategoriesArithmetic functionsFunctions and mappings