640784880

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1511}}^1$

素因数の和:1580

約数の個数: 240

約数和(自身を含む): 2339850240

約数和(自身を除く): 1699065360

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 19, 20, 24, 30, 31, 36, 38, 40, 45, 48, 57, 60, 62, 72, 76, 80, 90, 93, 95, 114, 120, 124, 144, 152, 155, 171, 180, 186, 190, 228, 240, 248, 279, 285, 304, 310, 342, 360, 372, 380, 456, 465, 496, 558, 570, 589, 620, 684, 720, 744, 760, 855, 912, 930, 1116, 1140, 1178, 1240, 1368, 1395, 1488, 1511, 1520, 1710, 1767, 1860, 2232, 2280, 2356, 2480, 2736, 2790, 2945, 3022, 3420, 3534, 3720, 4464, 4533, 4560, 4712, 5301, 5580, 5890, 6044, 6840, 7068, 7440, 7555, 8835, 9066, 9424, 10602, 11160, 11780, 12088, 13599, 13680, 14136, 15110, 17670, 18132, 21204, 22320, 22665, 23560, 24176, 26505, 27198, 28272, 28709, 30220, 35340, 36264, 42408, 45330, 46841, 47120, 53010, 54396, 57418, 60440, 67995, 70680, 72528, 84816, 86127, 90660, 93682, 106020, 108792, 114836, 120880, 135990, 140523, 141360, 143545, 172254, 181320, 187364, 212040, 217584, 229672, 234205, 258381, 271980, 281046, 287090, 344508, 362640, 374728, 421569, 424080, 430635, 459344, 468410, 516762, 543960, 562092, 574180, 689016, 702615, 749456, 843138, 861270, 889979, 936820, 1033524, 1087920, 1124184, 1148360, 1291905, 1378032, 1405230, 1686276, 1722540, 1779958, 1873640, 2067048, 2107845, 2248368, 2296720, 2583810, 2669937, 2810460, 3372552, 3445080, 3559916, 3747280, 4134096, 4215690, 4449895, 5167620, 5339874, 5620920, 6745104, 6890160, 7119832, 8009811, 8431380, 8899790, 10335240, 10679748, 11241840, 13349685, 14239664, 16019622, 16862760, 17799580, 20670480, 21359496, 26699370, 32039244, 33725520, 35599160, 40049055, 42718992, 53398740, 64078488, 71198320, 80098110, 106797480, 128156976, 160196220, 213594960, 320392440, 640784880]

約数ペア:

[(1, 640784880), (2, 320392440), (3, 213594960), (4, 160196220), (5, 128156976), (6, 106797480), (8, 80098110), (9, 71198320), (10, 64078488), (12, 53398740), (15, 42718992), (16, 40049055), (18, 35599160), (19, 33725520), (20, 32039244), (24, 26699370), (30, 21359496), (31, 20670480), (36, 17799580), (38, 16862760), (40, 16019622), (45, 14239664), (48, 13349685), (57, 11241840), (60, 10679748), (62, 10335240), (72, 8899790), (76, 8431380), (80, 8009811), (90, 7119832), (93, 6890160), (95, 6745104), (114, 5620920), (120, 5339874), (124, 5167620), (144, 4449895), (152, 4215690), (155, 4134096), (171, 3747280), (180, 3559916), (186, 3445080), (190, 3372552), (228, 2810460), (240, 2669937), (248, 2583810), (279, 2296720), (285, 2248368), (304, 2107845), (310, 2067048), (342, 1873640), (360, 1779958), (372, 1722540), (380, 1686276), (456, 1405230), (465, 1378032), (496, 1291905), (558, 1148360), (570, 1124184), (589, 1087920), (620, 1033524), (684, 936820), (720, 889979), (744, 861270), (760, 843138), (855, 749456), (912, 702615), (930, 689016), (1116, 574180), (1140, 562092), (1178, 543960), (1240, 516762), (1368, 468410), (1395, 459344), (1488, 430635), (1511, 424080), (1520, 421569), (1710, 374728), (1767, 362640), (1860, 344508), (2232, 287090), (2280, 281046), (2356, 271980), (2480, 258381), (2736, 234205), (2790, 229672), (2945, 217584), (3022, 212040), (3420, 187364), (3534, 181320), (3720, 172254), (4464, 143545), (4533, 141360), (4560, 140523), (4712, 135990), (5301, 120880), (5580, 114836), (5890, 108792), (6044, 106020), (6840, 93682), (7068, 90660), (7440, 86127), (7555, 84816), (8835, 72528), (9066, 70680), (9424, 67995), (10602, 60440), (11160, 57418), (11780, 54396), (12088, 53010), (13599, 47120), (13680, 46841), (14136, 45330), (15110, 42408), (17670, 36264), (18132, 35340), (21204, 30220), (22320, 28709), (22665, 28272), (23560, 27198), (24176, 26505)]