a concept of quantity involving zero and units

the integer part (positive or negative) of the representation of a logarithm; in the expression log 643 = 2.808 the characteristic is 2

one of two or more integers that can be exactly divided into another integer

an integer that is a multiple of two or more other integers

an integer that can be divided without remainder into the difference between two other integers

one of the elements that collectively form a system of numeration