640907640

素因数分解:

$2^3\times 3^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{709}}^1$

素因数の和:769

約数の個数: 224

約数和(自身を含む): 2234966400

約数和(自身を除く): 1594058760

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 81, 90, 93, 108, 120, 124, 135, 155, 162, 180, 186, 216, 243, 248, 270, 279, 310, 324, 360, 372, 405, 465, 486, 540, 558, 620, 648, 709, 729, 744, 810, 837, 930, 972, 1080, 1116, 1215, 1240, 1395, 1418, 1458, 1620, 1674, 1860, 1944, 2127, 2232, 2430, 2511, 2790, 2836, 2916, 3240, 3348, 3545, 3645, 3720, 4185, 4254, 4860, 5022, 5580, 5672, 5832, 6381, 6696, 7090, 7290, 7533, 8370, 8508, 9720, 10044, 10635, 11160, 12555, 12762, 14180, 14580, 15066, 16740, 17016, 19143, 20088, 21270, 21979, 22599, 25110, 25524, 28360, 29160, 30132, 31905, 33480, 37665, 38286, 42540, 43958, 45198, 50220, 51048, 57429, 60264, 63810, 65937, 75330, 76572, 85080, 87916, 90396, 95715, 100440, 109895, 112995, 114858, 127620, 131874, 150660, 153144, 172287, 175832, 180792, 191430, 197811, 219790, 225990, 229716, 255240, 263748, 287145, 301320, 329685, 344574, 382860, 395622, 439580, 451980, 459432, 516861, 527496, 574290, 593433, 659370, 689148, 765720, 791244, 861435, 879160, 903960, 989055, 1033722, 1148580, 1186866, 1318740, 1378296, 1582488, 1722870, 1780299, 1978110, 2067444, 2297160, 2373732, 2584305, 2637480, 2967165, 3445740, 3560598, 3956220, 4134888, 4747464, 5168610, 5340897, 5934330, 6891480, 7121196, 7912440, 8901495, 10337220, 10681794, 11868660, 14242392, 16022691, 17802990, 20674440, 21363588, 23737320, 26704485, 32045382, 35605980, 42727176, 53408970, 64090764, 71211960, 80113455, 106817940, 128181528, 160226910, 213635880, 320453820, 640907640]

約数ペア:

[(1, 640907640), (2, 320453820), (3, 213635880), (4, 160226910), (5, 128181528), (6, 106817940), (8, 80113455), (9, 71211960), (10, 64090764), (12, 53408970), (15, 42727176), (18, 35605980), (20, 32045382), (24, 26704485), (27, 23737320), (30, 21363588), (31, 20674440), (36, 17802990), (40, 16022691), (45, 14242392), (54, 11868660), (60, 10681794), (62, 10337220), (72, 8901495), (81, 7912440), (90, 7121196), (93, 6891480), (108, 5934330), (120, 5340897), (124, 5168610), (135, 4747464), (155, 4134888), (162, 3956220), (180, 3560598), (186, 3445740), (216, 2967165), (243, 2637480), (248, 2584305), (270, 2373732), (279, 2297160), (310, 2067444), (324, 1978110), (360, 1780299), (372, 1722870), (405, 1582488), (465, 1378296), (486, 1318740), (540, 1186866), (558, 1148580), (620, 1033722), (648, 989055), (709, 903960), (729, 879160), (744, 861435), (810, 791244), (837, 765720), (930, 689148), (972, 659370), (1080, 593433), (1116, 574290), (1215, 527496), (1240, 516861), (1395, 459432), (1418, 451980), (1458, 439580), (1620, 395622), (1674, 382860), (1860, 344574), (1944, 329685), (2127, 301320), (2232, 287145), (2430, 263748), (2511, 255240), (2790, 229716), (2836, 225990), (2916, 219790), (3240, 197811), (3348, 191430), (3545, 180792), (3645, 175832), (3720, 172287), (4185, 153144), (4254, 150660), (4860, 131874), (5022, 127620), (5580, 114858), (5672, 112995), (5832, 109895), (6381, 100440), (6696, 95715), (7090, 90396), (7290, 87916), (7533, 85080), (8370, 76572), (8508, 75330), (9720, 65937), (10044, 63810), (10635, 60264), (11160, 57429), (12555, 51048), (12762, 50220), (14180, 45198), (14580, 43958), (15066, 42540), (16740, 38286), (17016, 37665), (19143, 33480), (20088, 31905), (21270, 30132), (21979, 29160), (22599, 28360), (25110, 25524)]