5564

Number
$5564$ (five thousand, five hundred and sixty-four) is:
 * $2^2 \times 13 \times 107$


 * The larger of the $4$th amicable pair, with $5020$:
 * $\map {\sigma_1} {5020} = \map {\sigma_1} {5564} = 10 \, 584 = 5020 + 5564$