Answer
Factors: $1, 3, 7, 9, 21$ and $63$
Work Step by Step
Start with the number $1$.
Divide $63$ by $1$. The result is $63$.
$63=1\cdot 63$
$1$ and $63$ are factors of $63$.
Divide $63$ by $2$. The result is $31.5$ (not a whole number).
$2$ does not divide evenly into $63$.
Divide $63$ by $3$. The result is $21$.
$63=3\cdot 21$
$3$ and $21$ are additional factors of $63$.
Divide $63$ by $4$. The result is $15.75$ (not a whole number).
$4$ does not divide evenly into $63$.
Divide $63$ by $5$. The result is $12.6$ (not a whole number).
$5$ does not divide evenly into $63$.
Divide $63$ by $6$. The result is $10.5$ (not a whole number).
$6$ does not divide evenly into $63$.
Divide $63$ by $7$. The result is $9$.
$63=7\cdot 9$
$7$ and $9$ are more factors of $63$.
Thus, the factors of $63$ are $1, 3, 7, 9, 21$ and $63$.
