Write all the factors of $72$.

Write all the factors of $75$.

Write all the common factors of $6$ and $12$.

Write all the common factors of $8$ and $24$.

Write all the common factors of $16$ and $20$.

Write all the common factors of $60$ and $120$.

Write all the common factors of $30$ and $45$.

Write all the common factors of $48$ and $64$.

Write all the common factors of $64$ and $80$.