19810401

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{11813}}^1$

素因数の和:11872

約数の個数: 16

約数和(自身を含む): 29109696

約数和(自身を除く): 9299295

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 11813, 35439, 153569, 460707, 507959, 1523877, 6603467, 19810401]

約数ペア:

[(1, 19810401), (3, 6603467), (13, 1523877), (39, 507959), (43, 460707), (129, 153569), (559, 35439), (1677, 11813)]