81311360

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{337}}^1$

素因数の和:398

約数の個数: 128

約数和(自身を含む): 217198800

約数和(自身を除く): 135887440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 64, 65, 80, 104, 116, 128, 130, 145, 160, 208, 232, 260, 290, 320, 337, 377, 416, 464, 520, 580, 640, 674, 754, 832, 928, 1040, 1160, 1348, 1508, 1664, 1685, 1856, 1885, 2080, 2320, 2696, 3016, 3370, 3712, 3770, 4160, 4381, 4640, 5392, 6032, 6740, 7540, 8320, 8762, 9280, 9773, 10784, 12064, 13480, 15080, 17524, 18560, 19546, 21568, 21905, 24128, 26960, 30160, 35048, 39092, 43136, 43810, 48256, 48865, 53920, 60320, 70096, 78184, 87620, 97730, 107840, 120640, 127049, 140192, 156368, 175240, 195460, 215680, 241280, 254098, 280384, 312736, 350480, 390920, 508196, 560768, 625472, 635245, 700960, 781840, 1016392, 1250944, 1270490, 1401920, 1563680, 2032784, 2540980, 2803840, 3127360, 4065568, 5081960, 6254720, 8131136, 10163920, 16262272, 20327840, 40655680, 81311360]

約数ペア:

[(1, 81311360), (2, 40655680), (4, 20327840), (5, 16262272), (8, 10163920), (10, 8131136), (13, 6254720), (16, 5081960), (20, 4065568), (26, 3127360), (29, 2803840), (32, 2540980), (40, 2032784), (52, 1563680), (58, 1401920), (64, 1270490), (65, 1250944), (80, 1016392), (104, 781840), (116, 700960), (128, 635245), (130, 625472), (145, 560768), (160, 508196), (208, 390920), (232, 350480), (260, 312736), (290, 280384), (320, 254098), (337, 241280), (377, 215680), (416, 195460), (464, 175240), (520, 156368), (580, 140192), (640, 127049), (674, 120640), (754, 107840), (832, 97730), (928, 87620), (1040, 78184), (1160, 70096), (1348, 60320), (1508, 53920), (1664, 48865), (1685, 48256), (1856, 43810), (1885, 43136), (2080, 39092), (2320, 35048), (2696, 30160), (3016, 26960), (3370, 24128), (3712, 21905), (3770, 21568), (4160, 19546), (4381, 18560), (4640, 17524), (5392, 15080), (6032, 13480), (6740, 12064), (7540, 10784), (8320, 9773), (8762, 9280)]