18997461

素因数分解:

$3^2\times 7^1\times {\mathrm{151}}^1\times {\mathrm{1997}}^1$

素因数の和:2161

約数の個数: 24

約数和(自身を含む): 31584384

約数和(自身を除く): 12586923

約数列:

[1, 3, 7, 9, 21, 63, 151, 453, 1057, 1359, 1997, 3171, 5991, 9513, 13979, 17973, 41937, 125811, 301547, 904641, 2110829, 2713923, 6332487, 18997461]

約数ペア:

[(1, 18997461), (3, 6332487), (7, 2713923), (9, 2110829), (21, 904641), (63, 301547), (151, 125811), (453, 41937), (1057, 17973), (1359, 13979), (1997, 9513), (3171, 5991)]