divisor function
noun1
Mathematics, Sciences A function yielding the sum of the divisors of an integer. It is denoted by the Greek letter σ (sigma).
- The value of the divisor function for 20 is 1 + 2 + 4 + 5 + 10 + 20 = 42, denoted as σ(20) = 42.
Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.