18997317

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{641}}^1$

素因数の和:773

約数の個数: 24

約数和(自身を含む): 28543320

約数和(自身を除く): 9546003

約数列:

[1, 3, 9, 37, 89, 111, 267, 333, 641, 801, 1923, 3293, 5769, 9879, 23717, 29637, 57049, 71151, 171147, 213453, 513441, 2110813, 6332439, 18997317]

約数ペア:

[(1, 18997317), (3, 6332439), (9, 2110813), (37, 513441), (89, 213453), (111, 171147), (267, 71151), (333, 57049), (641, 29637), (801, 23717), (1923, 9879), (3293, 5769)]