20485881

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{311}}^1\times {\mathrm{563}}^1$

素因数の和:893

約数の個数: 24

約数和(自身を含む): 32026176

約数和(自身を除く): 11540295

約数列:

[1, 3, 9, 13, 39, 117, 311, 563, 933, 1689, 2799, 4043, 5067, 7319, 12129, 21957, 36387, 65871, 175093, 525279, 1575837, 2276209, 6828627, 20485881]

約数ペア:

[(1, 20485881), (3, 6828627), (9, 2276209), (13, 1575837), (39, 525279), (117, 175093), (311, 65871), (563, 36387), (933, 21957), (1689, 12129), (2799, 7319), (4043, 5067)]