Dauntless = Gryffindor (for obvious reasons)

Amity = Hufflepuff (since they're both hard working)

Erudite = Ravenclaw (since both are smart)

Candor = Slytherin (since Abnegation definitely isn't Slytherin)

Abnegation = N/A

Factionless = Squibs

Divergent = Hatstalls (since the sorting hat doesn't know which house to put these people in)