10,856

Number
$10 \, 856$ (ten thousand, eight hundred and fifty-six) is:
 * $2^3 \times 23 \times 59$


 * The smaller of the $6$th amicable pair, with $10 \, 744$:
 * $\sigma \left({10 \, 744}\right) = \sigma \left({10 \, 856}\right) = 21 \, 600 = 10 \, 744 + 10 \, 856$