Find all the magic multiples of $6$ from $1$ to $100$.

Find the factors of $21$.

Find the factors of $60$.

Find the factors of $80$.

Find the factors of $100$.

Since $17\times 5=85$, therefore $1, 85,17, 5$ are the factors of $85$.

$21$ has only two factors, $21$ and $1$.

Since $2\times 3\times 4=24$, therefore $24$ is a multiple of $2, 3, 4$.