81991791721

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{3323}}^1\times {\mathrm{185519}}^1$

素因数の和:188868

約数の個数: 16

約数和(自身を含む): 98666956800

約数和(自身を除く): 16675165079

約数列:

[1, 7, 19, 133, 3323, 23261, 63137, 185519, 441959, 1298633, 3524861, 24674027, 616479637, 4315357459, 11713113103, 81991791721]

約数ペア:

[(1, 81991791721), (7, 11713113103), (19, 4315357459), (133, 616479637), (3323, 24674027), (23261, 3524861), (63137, 1298633), (185519, 441959)]