20686744

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{19}}^3\times {\mathrm{29}}^1$

素因数の和:105

約数の個数: 64

約数和(自身を含む): 45612000

約数和(自身を除く): 24925256

約数列:

[1, 2, 4, 8, 13, 19, 26, 29, 38, 52, 58, 76, 104, 116, 152, 232, 247, 361, 377, 494, 551, 722, 754, 988, 1102, 1444, 1508, 1976, 2204, 2888, 3016, 4408, 4693, 6859, 7163, 9386, 10469, 13718, 14326, 18772, 20938, 27436, 28652, 37544, 41876, 54872, 57304, 83752, 89167, 136097, 178334, 198911, 272194, 356668, 397822, 544388, 713336, 795644, 1088776, 1591288, 2585843, 5171686, 10343372, 20686744]

約数ペア:

[(1, 20686744), (2, 10343372), (4, 5171686), (8, 2585843), (13, 1591288), (19, 1088776), (26, 795644), (29, 713336), (38, 544388), (52, 397822), (58, 356668), (76, 272194), (104, 198911), (116, 178334), (152, 136097), (232, 89167), (247, 83752), (361, 57304), (377, 54872), (494, 41876), (551, 37544), (722, 28652), (754, 27436), (988, 20938), (1102, 18772), (1444, 14326), (1508, 13718), (1976, 10469), (2204, 9386), (2888, 7163), (3016, 6859), (4408, 4693)]