20915253

素因数分解:

$3^5\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1$

素因数の和:176

約数の個数: 48

約数和(自身を含む): 34122816

約数和(自身を除く): 13207563

約数列:

[1, 3, 9, 17, 27, 51, 61, 81, 83, 153, 183, 243, 249, 459, 549, 747, 1037, 1377, 1411, 1647, 2241, 3111, 4131, 4233, 4941, 5063, 6723, 9333, 12699, 14823, 15189, 20169, 27999, 38097, 45567, 83997, 86071, 114291, 136701, 251991, 258213, 342873, 410103, 774639, 1230309, 2323917, 6971751, 20915253]

約数ペア:

[(1, 20915253), (3, 6971751), (9, 2323917), (17, 1230309), (27, 774639), (51, 410103), (61, 342873), (81, 258213), (83, 251991), (153, 136701), (183, 114291), (243, 86071), (249, 83997), (459, 45567), (549, 38097), (747, 27999), (1037, 20169), (1377, 15189), (1411, 14823), (1647, 12699), (2241, 9333), (3111, 6723), (4131, 5063), (4233, 4941)]