divisor

noun Mathematics.

1. a number by which another number, the dividend, is divided.
2. a number contained in another given number a certain integral number of times, without a remainder.

noun

1. a number or quantity to be divided into another number or quantity (the dividend)
2. a number that is a factor of another number

1. A number used to divide another. In the equation 15 ÷ 3 = 5, 3 is the divisor.