|addend + addend =||sum| |minuend − subtrahend =||difference|
|multiplicand × multiplier =||product| |dividend ÷ divisor
=||quotient| |nth root (√)| |degree √ =||root| In general, for
non-zero integers and , it is said that divides —and, dually,
that is divisible by —written: if there exists an integer such
that . Thus, divisors can be negative as well as positive,
although sometimes the term is restricted to positive divisors.
(For example, there are six divisors of four, 1, 2, 4, −1, −2,
−4, but only the positive ones would usually be mentioned, i.e.
1, 2, and 4.) 1 and −1 divide (are divisors of) every integer,
every integer (and its negation) is a divisor of itself, and
every integer is a divisor of 0, except by convention 0 itself
(see also division by zero). Numbers divisible by 2 are called
even and numbers not divisible by 2 are called odd. 1, −1, n and
−n are known as the trivial divisors of n. A divisor of n that
is not a trivial divisor is known as a non-trivial divisor. A
number with at least one