divisor

from WordNet (r) 3.0 (2006)
divisor
    n 1: one of two or more integers that can be exactly divided
         into another integer; "what are the 4 factors of 6?" [syn:
         {divisor}, {factor}]
    2: the number by which a dividend is divided
    
from The Collaborative International Dictionary of English v.0.48
Divisor \Di*vi"sor\, n. [L., fr. dividere. See {Divide}.]
   (Math.)
   The number by which the dividend is divided.
   [1913 Webster]

   {Common divisor}. (Math.) See under {Common}, a.
      [1913 Webster]
    
from The Free On-line Dictionary of Computing (8 July 2008)
divisor

   A quantity that evenly divides another quantity.

   Unless otherwise stated, use of this term implies that the
   quantities involved are integers.  (For non-integers, the more
   general term {factor} may be more appropriate.)

    Example: 3 is a divisor of 15.
    Example: 3 is not a divisor of 14.

   (1997-03-07)
    

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