81920020

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1$

素因数の和:174

約数の個数: 192

約数和(自身を含む): 234823680

約数和(自身を除く): 152903660

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 19, 20, 23, 26, 28, 35, 38, 46, 52, 65, 70, 76, 91, 92, 95, 103, 115, 130, 133, 140, 161, 182, 190, 206, 230, 247, 260, 266, 299, 322, 364, 380, 412, 437, 455, 460, 494, 515, 532, 598, 644, 665, 721, 805, 874, 910, 988, 1030, 1196, 1235, 1330, 1339, 1442, 1495, 1610, 1729, 1748, 1820, 1957, 2060, 2093, 2185, 2369, 2470, 2660, 2678, 2884, 2990, 3059, 3220, 3458, 3605, 3914, 4186, 4370, 4738, 4940, 5356, 5681, 5980, 6118, 6695, 6916, 7210, 7828, 8372, 8645, 8740, 9373, 9476, 9785, 10465, 11362, 11845, 12236, 13390, 13699, 14420, 15295, 16583, 17290, 18746, 19570, 20930, 22724, 23690, 25441, 26780, 27398, 28405, 30590, 30797, 33166, 34580, 37492, 39140, 39767, 41860, 45011, 46865, 47380, 50882, 54796, 56810, 61180, 61594, 66332, 68495, 79534, 82915, 90022, 93730, 101764, 113620, 123188, 127205, 136990, 153985, 159068, 165830, 178087, 180044, 187460, 198835, 215579, 225055, 254410, 273980, 307970, 315077, 331660, 356174, 397670, 431158, 450110, 508820, 585143, 615940, 630154, 712348, 795340, 862316, 890435, 900220, 1077895, 1170286, 1260308, 1575385, 1780870, 2155790, 2340572, 2925715, 3150770, 3561740, 4096001, 4311580, 5851430, 6301540, 8192002, 11702860, 16384004, 20480005, 40960010, 81920020]

約数ペア:

[(1, 81920020), (2, 40960010), (4, 20480005), (5, 16384004), (7, 11702860), (10, 8192002), (13, 6301540), (14, 5851430), (19, 4311580), (20, 4096001), (23, 3561740), (26, 3150770), (28, 2925715), (35, 2340572), (38, 2155790), (46, 1780870), (52, 1575385), (65, 1260308), (70, 1170286), (76, 1077895), (91, 900220), (92, 890435), (95, 862316), (103, 795340), (115, 712348), (130, 630154), (133, 615940), (140, 585143), (161, 508820), (182, 450110), (190, 431158), (206, 397670), (230, 356174), (247, 331660), (260, 315077), (266, 307970), (299, 273980), (322, 254410), (364, 225055), (380, 215579), (412, 198835), (437, 187460), (455, 180044), (460, 178087), (494, 165830), (515, 159068), (532, 153985), (598, 136990), (644, 127205), (665, 123188), (721, 113620), (805, 101764), (874, 93730), (910, 90022), (988, 82915), (1030, 79534), (1196, 68495), (1235, 66332), (1330, 61594), (1339, 61180), (1442, 56810), (1495, 54796), (1610, 50882), (1729, 47380), (1748, 46865), (1820, 45011), (1957, 41860), (2060, 39767), (2093, 39140), (2185, 37492), (2369, 34580), (2470, 33166), (2660, 30797), (2678, 30590), (2884, 28405), (2990, 27398), (3059, 26780), (3220, 25441), (3458, 23690), (3605, 22724), (3914, 20930), (4186, 19570), (4370, 18746), (4738, 17290), (4940, 16583), (5356, 15295), (5681, 14420), (5980, 13699), (6118, 13390), (6695, 12236), (6916, 11845), (7210, 11362), (7828, 10465), (8372, 9785), (8645, 9476), (8740, 9373)]