The grandson of a Harlem woman whose body was found stuffed in a closet was arrested yesterday and charged with her murder, police said.

Larry Davis, 22, is accused of killing Cora Davis, 76, whose body was discovered just before 11 a.m. March 30 in her apartment at the Wagner Houses on East 124th Street. She died of blunt-impact trauma to her neck.

Cops said that after the murder, Davis embarked on a two-day sex romp with a 20-year-old woman once collared for prostitution.

Davis has prior busts for drug possession, bail-jumping, grand larceny and trespassing.