subfactor
/ˈsʌbˌfaktə/noun
1A person employed as a subordinate to a factor; (Scottish ) an assistant to a factor whose main duty is to collect rent. Now historical.
2A subordinate or subsidiary factor.
3 Mathematics. A factor of a quantity that is itself a factor.
Origin
Mid 17th century; earliest use found in Lewes Roberts (1596–1641), merchant and author. From sub- + factor.