20780147718

素因数分解:

$2^1\times 3^2\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{257863}}^1$

素因数の和:257930

約数の個数: 72

約数和(自身を含む): 50826541584

約数和(自身を除く): 30046393866

約数列:

[1, 2, 3, 6, 9, 11, 18, 22, 33, 37, 66, 74, 99, 111, 121, 198, 222, 242, 333, 363, 407, 666, 726, 814, 1089, 1221, 2178, 2442, 3663, 4477, 7326, 8954, 13431, 26862, 40293, 80586, 257863, 515726, 773589, 1547178, 2320767, 2836493, 4641534, 5672986, 8509479, 9540931, 17018958, 19081862, 25528437, 28622793, 31201423, 51056874, 57245586, 62402846, 85868379, 93604269, 104950241, 171736758, 187208538, 209900482, 280812807, 314850723, 561625614, 629701446, 944552169, 1154452651, 1889104338, 2308905302, 3463357953, 6926715906, 10390073859, 20780147718]

約数ペア:

[(1, 20780147718), (2, 10390073859), (3, 6926715906), (6, 3463357953), (9, 2308905302), (11, 1889104338), (18, 1154452651), (22, 944552169), (33, 629701446), (37, 561625614), (66, 314850723), (74, 280812807), (99, 209900482), (111, 187208538), (121, 171736758), (198, 104950241), (222, 93604269), (242, 85868379), (333, 62402846), (363, 57245586), (407, 51056874), (666, 31201423), (726, 28622793), (814, 25528437), (1089, 19081862), (1221, 17018958), (2178, 9540931), (2442, 8509479), (3663, 5672986), (4477, 4641534), (7326, 2836493), (8954, 2320767), (13431, 1547178), (26862, 773589), (40293, 515726), (80586, 257863)]