357

Number
$357$ (three hundred and fifty-seven) is:


 * $3 \times 7 \times 17$


 * The $20$th number after $1, 3, 22, 66, 70, 81, 94, 115, 119, 170, 210, 214, 217, 265, 282, 310, 322, 343, 345$ whose $\sigma$ value is square: