arithmetic function
any function whose domain is the positive integers and whose range is a subset of the complex numbers
least common multiple
smallest positive integer divisible by two or more integers
Liouville function
arithmetic function
Carmichael function
arithmetic functions
Kempner function
function that maps an integer 𝑛 to the smallest integer whose factorial is a multiple of 𝑛
sum of squares function
function in mathematical number theory
greatest common divisor
largest divisor of two integers or polynomials
multiplicative function
arithmetic function that is multiplicative for every pair of coprime integers
additive function
arithmetic function such that the image of the product of two coprimes is the sum of their images