$$\left. \begin{array} { l } { F } \\ { 527 } \\ { 646 } \\ { 748 } \end{array} \right.$$
$440572F$
$$527=17\times 31$$ $$646=2\times 17\times 19$$ $$748=2^{2}\times 11\times 17$$
$$440572F$$
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$F,\ 527,\ 646,\ 748$
