The Oxford Thesaurus An A-Z Dictionary of Synonyms - factorn.

1) constituent, ingredient, element, part, particular, piece, component; circumstance, consideration, aspect, fact, influence, determinant, cause: Which factors contributed to the decline of Mayan civilization? 2 agent, representative, proxy, middleman, intermediary, deputy, go-between: Our company has a factor handling all our exports. 3) banker, financier, backer, moneylender, lender: The factors lent us money to buy the stock needed to fill the orders.