20904129

素因数分解:

$3^3\times {\mathrm{109}}^1\times {\mathrm{7103}}^1$

素因数の和:7221

約数の個数: 16

約数和(自身を含む): 31257600

約数和(自身を除く): 10353471

約数列:

[1, 3, 9, 27, 109, 327, 981, 2943, 7103, 21309, 63927, 191781, 774227, 2322681, 6968043, 20904129]

約数ペア:

[(1, 20904129), (3, 6968043), (9, 2322681), (27, 774227), (109, 191781), (327, 63927), (981, 21309), (2943, 7103)]