$${ 78 }^{ 2 } { 21 }^{ 2 } { 60 }^{ 2 }$$
$9658958400$
$$6084\times 21^{2}\times 60^{2}$$
$$6084\times 441\times 60^{2}$$
$$2683044\times 60^{2}$$
$$2683044\times 3600$$
$$9658958400$$
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$2^{6}\times 3^{6}\times 5^{2}\times 7^{2}\times 13^{2}$
