16991217

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{179}}^1\times {\mathrm{199}}^1$

素因数の和:437

約数の個数: 24

約数和(自身を含む): 25272000

約数和(自身を除く): 8280783

約数列:

[1, 3, 9, 53, 159, 179, 199, 477, 537, 597, 1611, 1791, 9487, 10547, 28461, 31641, 35621, 85383, 94923, 106863, 320589, 1887913, 5663739, 16991217]

約数ペア:

[(1, 16991217), (3, 5663739), (9, 1887913), (53, 320589), (159, 106863), (179, 94923), (199, 85383), (477, 35621), (537, 31641), (597, 28461), (1611, 10547), (1791, 9487)]