« 19521 »
Tulaj: pafi
Rendelkezés: In mathematics, a k-hyperperfect number (sometimes just called hyperperfect number) is a natural number n for which the equality n = 1 + k(σ(n) − n − 1) holds, where σ(n) is the divisor function (i.e., the sum of all positive divisors of n). A number is perfect iff it is 1-hyperperfect.
Megszerezve: 2008-08-29 14:02:50
