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:


 * The $16$th integer $n$ after $1, 3, 15, 30, 35, 56, 70, 78, 105, 140, 168, 190, 210, 248, 264$ with the property that $\tau \left({n}\right) \mathrel \backslash \phi \left({n}\right) \mathrel \backslash \sigma \left({n}\right)$:
 * $\tau \left({357}\right) = 8$, $\phi \left({357}\right) = 192$, $\sigma \left({357}\right) = 576$