Question5. If 21 divides $m$, what else must divide $m$ ?

Studdy Solution
Conclude that if $21$ divides $m$, then all divisors of $21$ must also divide $m$.
Therefore, $m$ must be divisible by $1, 3, 7,$ and $21$.
The divisors of $m$ must include:
$\boxed{1, 3, 7, \text{ and } 21}$