Question

How do you find all factors of $36$ ?

Answer 1

Factors of a number are numbers that divide exactly into that number. So the factors of $36$ are the numbers that divide exactly into it.
One way is to find what pairs of numbers multiply to give $36$
$1\times 36=36$
so $1\&36$ are factors.
$2\times 18=36$
$3\times 12=36$
$4\times 9=36$
$6\times 6=36$
There are no more possible pairs so we have all the factors in question factors of $36:\{1,2,3,4,6,9,12,36\}$