21591441

素因数分解:

$3^4\times {\mathrm{149}}^1\times {\mathrm{1789}}^1$

素因数の和:1950

約数の個数: 20

約数和(自身を含む): 32488500

約数和(自身を除く): 10897059

約数列:

[1, 3, 9, 27, 81, 149, 447, 1341, 1789, 4023, 5367, 12069, 16101, 48303, 144909, 266561, 799683, 2399049, 7197147, 21591441]

約数ペア:

[(1, 21591441), (3, 7197147), (9, 2399049), (27, 799683), (81, 266561), (149, 144909), (447, 48303), (1341, 16101), (1789, 12069), (4023, 5367)]