284

Number
$284$ (two hundred and eighty-four) is:


 * $2^2 \times 71$


 * The $2$nd integer solution to $\sigma \left({n}\right) = \sigma \left({n + 2}\right)$ after $33, 54$:
 * $\sigma \left({284}\right) = 504 = \sigma \left({286}\right)$


 * The larger of the $1$st amicable pair, with $220$:
 * $\sigma \left({220}\right) = \sigma \left({284}\right) = 504 = 220 + 284$