$54 = $ ?

$2 \times 3^{2}$ $2^{2} \times 3^{3}$ $2 \times 3^{3} \times 5$ $2 \times 3$ $2 \times 3^{3}$

$891 = $ ?

$3^{3} \times 11$ $3^{4} \times 11^{2}$ $3^{4} \times 11$ $3^{4} \times 11 \times 19$ $3^{5} \times 11$

$175 = $ ?

$5^{2} \times 7$ $5^{2} \times 7 \times 19$ $3 \times 5^{2} \times 7$ $5^{2} \times 7 \times 13$ $5^{3} \times 7$

$120 = $ ?

$2^{2} \times 3 \times 5$ $2^{3} \times 3 \times 5$ $2^{3} \times 3 \times 5 \times 7$ $2^{3} \times 3 \times 5 \times 13$ $2^{3} \times 3 \times 5^{2}$

$1050 = $ ?

$2^{2} \times 3 \times 5^{2} \times 7$ $2 \times 3 \times 5^{2} \times 7^{2}$ $2 \times 3 \times 5^{3} \times 7$ $2 \times 3 \times 5^{2} \times 7 \times 19$ $2 \times 3 \times 5^{2} \times 7$