[tex]54 = 2 \times {3}^{3} [/tex]
[tex]60 = {2}^{2} \times 5 \times 3[/tex]
[tex]64 = {2}^{5} [/tex]
[tex]72 = {2}^{3} \times {3}^{2} [/tex]
[tex]80 = 5 \times {2}^{4} [/tex]
[tex]84 = {2}^{2} \times 7 \times 3[/tex]
[tex]88 = {2}^{3} \times 11[/tex]
[tex]90 = 2 \times 5 \times {3}^{2} [/tex]
[tex]96 = {2}^{5} \times 3[/tex]