Ganson's Conjecture makes a prediction about one type of them, which are structured by Andersen's Theorem.
Ganson's Conjecture makes a prediction about one type of them, which are structured by Andersen's Theorem. A weird number is abundant but cannot fall into this category. A one-to-one relation between some of them and Mersenne primes is implied by the Euclid-Euler theorem. Carl Pomerance showed that odd ones must have at least seven prime factors, but it is unknown if any odd ones exist. 6, 28, and 496 are the first three of 43 known ones. FTP, give this term for numbers which are the sum of their proper positive divisors.
Ganson's Conjecture makes a prediction about one type of them, which are structured by Andersen's Theorem.
{perfect} numbers (accept {picture-perfect} numbers or {semiperfect} or {pseudoperfect})