Which of these numbers is $6$6 a factor of?
$30$30
$32$32
$17$17
$39$39
If we multiply $4$4 by $14$14, we get $56$56, so $4$4 and $14$14 make a factor pair of $56$56.
What is the highest common factor of $12$12 and $16$16?
Is $\left(8,2\right)$(8,2) a factor pair of $8$8?