Infinary Multiperfect Number
Let 
be the Sum of the Infinary Divisors of a number 
.An infinary 
-multiperfect number is a number such that 
. Cohen (1990) found 13 infinary 3-multiperfects, seven 4-multiperfects, and two 5-multiperfects.
References
Cohen, G. L. ``On an Integer's Infinary Divisors.'' Math. Comput. 54, 395-411, 1990. Guy, R. K. Unsolved Problems in Number Theory, 2nd ed. New York: Springer-Verlag, p. 54, 1994.
- Grassmann Coordinates
- Grassmann Manifold
- Gray Code
- Great Circle
- Great Cubicuboctahedron
- Great Deltoidal Hexecontahedron
- Great Deltoidal Icositetrahedron
- Great Dirhombicosidodecacron
- Great Dirhombicosidodecahedron
- Great Disdyakis Dodecahedron
- Great Disdyakis Triacontahedron
- Great Ditrigonal Dodecacronic Hexecontahedron
- Great Ditrigonal Dodecicosidodecahedron
- Great Ditrigonal Icosidodecahedron
- Great Dodecacronic Hexecontahedron
- Great Dodecadodecahedron
- Great Dodecahedron
- Great Dodecahedron-Small Stellated Dodecahedron Compound
- Great Dodecahemicosacron
- Great Dodecahemicosahedron
- Great Dodecahemidodecacron
- Great Dodecahemidodecahedron
- Great Dodecicosacron
- Great Dodecicosahedron
- Great Dodecicosidodecahedron