20931840

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1$

素因数の和:129

約数の個数: 216

約数和(自身を含む): 76527360

約数和(自身を除く): 55595520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 64, 69, 72, 79, 80, 90, 92, 96, 115, 120, 128, 138, 144, 158, 160, 180, 184, 192, 207, 230, 237, 240, 256, 276, 288, 316, 320, 345, 360, 368, 384, 395, 414, 460, 474, 480, 552, 576, 632, 640, 690, 711, 720, 736, 768, 790, 828, 920, 948, 960, 1035, 1104, 1152, 1185, 1264, 1280, 1380, 1422, 1440, 1472, 1580, 1656, 1817, 1840, 1896, 1920, 2070, 2208, 2304, 2370, 2528, 2760, 2844, 2880, 2944, 3160, 3312, 3555, 3634, 3680, 3792, 3840, 4140, 4416, 4740, 5056, 5451, 5520, 5688, 5760, 5888, 6320, 6624, 7110, 7268, 7360, 7584, 8280, 8832, 9085, 9480, 10112, 10902, 11040, 11376, 11520, 12640, 13248, 14220, 14536, 14720, 15168, 16353, 16560, 17664, 18170, 18960, 20224, 21804, 22080, 22752, 25280, 26496, 27255, 28440, 29072, 29440, 30336, 32706, 33120, 36340, 37920, 43608, 44160, 45504, 50560, 52992, 54510, 56880, 58144, 60672, 65412, 66240, 72680, 75840, 81765, 87216, 88320, 91008, 101120, 109020, 113760, 116288, 130824, 132480, 145360, 151680, 163530, 174432, 182016, 218040, 227520, 232576, 261648, 264960, 290720, 303360, 327060, 348864, 436080, 455040, 465152, 523296, 581440, 654120, 697728, 872160, 910080, 1046592, 1162880, 1308240, 1395456, 1744320, 2093184, 2325760, 2616480, 3488640, 4186368, 5232960, 6977280, 10465920, 20931840]

約数ペア:

[(1, 20931840), (2, 10465920), (3, 6977280), (4, 5232960), (5, 4186368), (6, 3488640), (8, 2616480), (9, 2325760), (10, 2093184), (12, 1744320), (15, 1395456), (16, 1308240), (18, 1162880), (20, 1046592), (23, 910080), (24, 872160), (30, 697728), (32, 654120), (36, 581440), (40, 523296), (45, 465152), (46, 455040), (48, 436080), (60, 348864), (64, 327060), (69, 303360), (72, 290720), (79, 264960), (80, 261648), (90, 232576), (92, 227520), (96, 218040), (115, 182016), (120, 174432), (128, 163530), (138, 151680), (144, 145360), (158, 132480), (160, 130824), (180, 116288), (184, 113760), (192, 109020), (207, 101120), (230, 91008), (237, 88320), (240, 87216), (256, 81765), (276, 75840), (288, 72680), (316, 66240), (320, 65412), (345, 60672), (360, 58144), (368, 56880), (384, 54510), (395, 52992), (414, 50560), (460, 45504), (474, 44160), (480, 43608), (552, 37920), (576, 36340), (632, 33120), (640, 32706), (690, 30336), (711, 29440), (720, 29072), (736, 28440), (768, 27255), (790, 26496), (828, 25280), (920, 22752), (948, 22080), (960, 21804), (1035, 20224), (1104, 18960), (1152, 18170), (1185, 17664), (1264, 16560), (1280, 16353), (1380, 15168), (1422, 14720), (1440, 14536), (1472, 14220), (1580, 13248), (1656, 12640), (1817, 11520), (1840, 11376), (1896, 11040), (1920, 10902), (2070, 10112), (2208, 9480), (2304, 9085), (2370, 8832), (2528, 8280), (2760, 7584), (2844, 7360), (2880, 7268), (2944, 7110), (3160, 6624), (3312, 6320), (3555, 5888), (3634, 5760), (3680, 5688), (3792, 5520), (3840, 5451), (4140, 5056), (4416, 4740)]