$${ 7 }^{ 2 } | { 2 }^{ 2 } { 6 }^{ 2 } { 9 }^{ 2 }$$
$571536$
$$49|2^{2}\times 6^{2}\times 9^{2}|$$
$$49|4\times 6^{2}\times 9^{2}|$$
$$49|4\times 36\times 9^{2}|$$
$$49|144\times 9^{2}|$$
$$49|144\times 81|$$
$$49|11664|$$
$$49\times 11664$$
$$571536$$
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$2^{4}\times 3^{6}\times 7^{2}$
