20517120

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1$

素因数の和:177

約数の個数: 216

約数和(自身を含む): 77005656

約数和(自身を除く): 56488536

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 30, 32, 36, 39, 40, 45, 48, 52, 60, 64, 65, 72, 78, 80, 90, 96, 104, 117, 120, 128, 130, 137, 144, 156, 160, 180, 192, 195, 208, 234, 240, 256, 260, 274, 288, 312, 320, 360, 384, 390, 411, 416, 468, 480, 520, 548, 576, 585, 624, 640, 685, 720, 768, 780, 822, 832, 936, 960, 1040, 1096, 1152, 1170, 1233, 1248, 1280, 1370, 1440, 1560, 1644, 1664, 1781, 1872, 1920, 2055, 2080, 2192, 2304, 2340, 2466, 2496, 2740, 2880, 3120, 3288, 3328, 3562, 3744, 3840, 4110, 4160, 4384, 4680, 4932, 4992, 5343, 5480, 5760, 6165, 6240, 6576, 7124, 7488, 8220, 8320, 8768, 8905, 9360, 9864, 9984, 10686, 10960, 11520, 12330, 12480, 13152, 14248, 14976, 16029, 16440, 16640, 17536, 17810, 18720, 19728, 21372, 21920, 24660, 24960, 26304, 26715, 28496, 29952, 32058, 32880, 35072, 35620, 37440, 39456, 42744, 43840, 49320, 49920, 52608, 53430, 56992, 64116, 65760, 71240, 74880, 78912, 80145, 85488, 87680, 98640, 105216, 106860, 113984, 128232, 131520, 142480, 149760, 157824, 160290, 170976, 175360, 197280, 213720, 227968, 256464, 263040, 284960, 315648, 320580, 341952, 394560, 427440, 455936, 512928, 526080, 569920, 641160, 683904, 789120, 854880, 1025856, 1139840, 1282320, 1367808, 1578240, 1709760, 2051712, 2279680, 2564640, 3419520, 4103424, 5129280, 6839040, 10258560, 20517120]

約数ペア:

[(1, 20517120), (2, 10258560), (3, 6839040), (4, 5129280), (5, 4103424), (6, 3419520), (8, 2564640), (9, 2279680), (10, 2051712), (12, 1709760), (13, 1578240), (15, 1367808), (16, 1282320), (18, 1139840), (20, 1025856), (24, 854880), (26, 789120), (30, 683904), (32, 641160), (36, 569920), (39, 526080), (40, 512928), (45, 455936), (48, 427440), (52, 394560), (60, 341952), (64, 320580), (65, 315648), (72, 284960), (78, 263040), (80, 256464), (90, 227968), (96, 213720), (104, 197280), (117, 175360), (120, 170976), (128, 160290), (130, 157824), (137, 149760), (144, 142480), (156, 131520), (160, 128232), (180, 113984), (192, 106860), (195, 105216), (208, 98640), (234, 87680), (240, 85488), (256, 80145), (260, 78912), (274, 74880), (288, 71240), (312, 65760), (320, 64116), (360, 56992), (384, 53430), (390, 52608), (411, 49920), (416, 49320), (468, 43840), (480, 42744), (520, 39456), (548, 37440), (576, 35620), (585, 35072), (624, 32880), (640, 32058), (685, 29952), (720, 28496), (768, 26715), (780, 26304), (822, 24960), (832, 24660), (936, 21920), (960, 21372), (1040, 19728), (1096, 18720), (1152, 17810), (1170, 17536), (1233, 16640), (1248, 16440), (1280, 16029), (1370, 14976), (1440, 14248), (1560, 13152), (1644, 12480), (1664, 12330), (1781, 11520), (1872, 10960), (1920, 10686), (2055, 9984), (2080, 9864), (2192, 9360), (2304, 8905), (2340, 8768), (2466, 8320), (2496, 8220), (2740, 7488), (2880, 7124), (3120, 6576), (3288, 6240), (3328, 6165), (3562, 5760), (3744, 5480), (3840, 5343), (4110, 4992), (4160, 4932), (4384, 4680)]