80704780

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^2$

素因数の和:120

約数の個数: 144

約数和(自身を含む): 210198240

約数和(自身を除く): 129493460

約数列:

[1, 2, 4, 5, 10, 13, 17, 19, 20, 26, 31, 34, 38, 52, 62, 65, 68, 76, 85, 95, 124, 130, 155, 170, 190, 221, 247, 260, 310, 323, 340, 380, 403, 442, 494, 527, 589, 620, 646, 806, 884, 961, 988, 1054, 1105, 1178, 1235, 1292, 1612, 1615, 1922, 2015, 2108, 2210, 2356, 2470, 2635, 2945, 3230, 3844, 4030, 4199, 4420, 4805, 4940, 5270, 5890, 6460, 6851, 7657, 8060, 8398, 9610, 10013, 10540, 11780, 12493, 13702, 15314, 16337, 16796, 18259, 19220, 20026, 20995, 24986, 27404, 30628, 32674, 34255, 36518, 38285, 40052, 41990, 49972, 50065, 62465, 65348, 68510, 73036, 76570, 81685, 83980, 91295, 100130, 124930, 130169, 137020, 153140, 163370, 182590, 200260, 212381, 237367, 249860, 260338, 310403, 326740, 365180, 424762, 474734, 520676, 620806, 650845, 849524, 949468, 1061905, 1186835, 1241612, 1301690, 1552015, 2123810, 2373670, 2603380, 3104030, 4035239, 4247620, 4747340, 6208060, 8070478, 16140956, 20176195, 40352390, 80704780]

約数ペア:

[(1, 80704780), (2, 40352390), (4, 20176195), (5, 16140956), (10, 8070478), (13, 6208060), (17, 4747340), (19, 4247620), (20, 4035239), (26, 3104030), (31, 2603380), (34, 2373670), (38, 2123810), (52, 1552015), (62, 1301690), (65, 1241612), (68, 1186835), (76, 1061905), (85, 949468), (95, 849524), (124, 650845), (130, 620806), (155, 520676), (170, 474734), (190, 424762), (221, 365180), (247, 326740), (260, 310403), (310, 260338), (323, 249860), (340, 237367), (380, 212381), (403, 200260), (442, 182590), (494, 163370), (527, 153140), (589, 137020), (620, 130169), (646, 124930), (806, 100130), (884, 91295), (961, 83980), (988, 81685), (1054, 76570), (1105, 73036), (1178, 68510), (1235, 65348), (1292, 62465), (1612, 50065), (1615, 49972), (1922, 41990), (2015, 40052), (2108, 38285), (2210, 36518), (2356, 34255), (2470, 32674), (2635, 30628), (2945, 27404), (3230, 24986), (3844, 20995), (4030, 20026), (4199, 19220), (4420, 18259), (4805, 16796), (4940, 16337), (5270, 15314), (5890, 13702), (6460, 12493), (6851, 11780), (7657, 10540), (8060, 10013), (8398, 9610)]