81338620

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:140

約数の個数: 144

約数和(自身を含む): 207799200

約数和(自身を除く): 126460580

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 29, 38, 44, 55, 58, 61, 76, 95, 110, 116, 121, 122, 145, 190, 209, 220, 242, 244, 290, 305, 319, 380, 418, 484, 551, 580, 605, 610, 638, 671, 836, 1045, 1102, 1159, 1210, 1220, 1276, 1342, 1595, 1769, 2090, 2204, 2299, 2318, 2420, 2684, 2755, 3190, 3355, 3509, 3538, 4180, 4598, 4636, 5510, 5795, 6061, 6380, 6710, 7018, 7076, 7381, 8845, 9196, 11020, 11495, 11590, 12122, 12749, 13420, 14036, 14762, 17545, 17690, 19459, 22990, 23180, 24244, 25498, 29524, 30305, 33611, 35090, 35380, 36905, 38918, 45980, 50996, 60610, 63745, 66671, 67222, 70180, 73810, 77836, 97295, 121220, 127490, 133342, 134444, 140239, 147620, 168055, 194590, 214049, 254980, 266684, 280478, 333355, 336110, 369721, 389180, 428098, 560956, 666710, 672220, 701195, 739442, 856196, 1070245, 1333420, 1402390, 1478884, 1848605, 2140490, 2804780, 3697210, 4066931, 4280980, 7394420, 8133862, 16267724, 20334655, 40669310, 81338620]

約数ペア:

[(1, 81338620), (2, 40669310), (4, 20334655), (5, 16267724), (10, 8133862), (11, 7394420), (19, 4280980), (20, 4066931), (22, 3697210), (29, 2804780), (38, 2140490), (44, 1848605), (55, 1478884), (58, 1402390), (61, 1333420), (76, 1070245), (95, 856196), (110, 739442), (116, 701195), (121, 672220), (122, 666710), (145, 560956), (190, 428098), (209, 389180), (220, 369721), (242, 336110), (244, 333355), (290, 280478), (305, 266684), (319, 254980), (380, 214049), (418, 194590), (484, 168055), (551, 147620), (580, 140239), (605, 134444), (610, 133342), (638, 127490), (671, 121220), (836, 97295), (1045, 77836), (1102, 73810), (1159, 70180), (1210, 67222), (1220, 66671), (1276, 63745), (1342, 60610), (1595, 50996), (1769, 45980), (2090, 38918), (2204, 36905), (2299, 35380), (2318, 35090), (2420, 33611), (2684, 30305), (2755, 29524), (3190, 25498), (3355, 24244), (3509, 23180), (3538, 22990), (4180, 19459), (4598, 17690), (4636, 17545), (5510, 14762), (5795, 14036), (6061, 13420), (6380, 12749), (6710, 12122), (7018, 11590), (7076, 11495), (7381, 11020), (8845, 9196)]