a proper factor is a factor.

factor I (fibrinogen), factor II (prothrombin), factor III (tissue thromboplastin), factor IV (calcium), factor V (proaccelerin), factor VI (no longer considered active in hemostasis), factor VII (factor-vii), factor VIII (antihemophilicfactor), factor IX (plasma thromboplastincomponent; Christmas factor), factor X (stuart-factor-stuart-prower-factor), factor XI (plasma thromboplastinantecedent), factor XII (factor-xii), factor XIII (fibrin stabilizing factor).

factor pair = 1512,1

factor pair = 756,2

factor pair = 504,3

factor pair = 378,4

factor pair = 252,6

factor pair = 216,7

factor pair = 189,8

factor pair = 168,9

factor pair = 126,12

factor pair = 108,14

factor pair = 84,18

factor pair = 72,21

factor pair = 63,24

factor pair = 56,27

factor pair = 54,28

factor pair = 42,36

http://web.indstate.edu/thcme/mwking/blood-coagulation.html

Factor I = Fibrinogen Factor II = Prothrombin Factor III = Tissue factor Factor IV = Calcium Factor V = Labile factor Factor VI - Does not exist as it was named initially but later on discovered not to play a part in blood coagulation. Factor VII = Stable factor Factor VIII = Antihemophilic factor A Factor IX = Antihemophilic factor B or Christmas factor (named after the first patient in whom the factor deficiency was documented) Factor X = Stuart Prower factor Factor XI = Antihemophilic factor C Factor XII = Hageman factor Factor XIII = Fibrin stabilising factor

a factor bug is a factor