20666880

素因数分解:

$2^9\times 3^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1$

素因数の和:68

約数の個数: 320

約数和(自身を含む): 82494720

約数和(自身を除く): 61827840

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 23, 24, 26, 27, 30, 32, 36, 39, 40, 45, 46, 48, 52, 54, 60, 64, 65, 69, 72, 78, 80, 90, 92, 96, 104, 108, 115, 117, 120, 128, 130, 135, 138, 144, 156, 160, 180, 184, 192, 195, 207, 208, 216, 230, 234, 240, 256, 260, 270, 276, 288, 299, 312, 320, 345, 351, 360, 368, 384, 390, 414, 416, 432, 460, 468, 480, 512, 520, 540, 552, 576, 585, 598, 621, 624, 640, 690, 702, 720, 736, 768, 780, 828, 832, 864, 897, 920, 936, 960, 1035, 1040, 1080, 1104, 1152, 1170, 1196, 1242, 1248, 1280, 1380, 1404, 1440, 1472, 1495, 1536, 1560, 1656, 1664, 1728, 1755, 1794, 1840, 1872, 1920, 2070, 2080, 2160, 2208, 2304, 2340, 2392, 2484, 2496, 2560, 2691, 2760, 2808, 2880, 2944, 2990, 3105, 3120, 3312, 3328, 3456, 3510, 3588, 3680, 3744, 3840, 4140, 4160, 4320, 4416, 4485, 4608, 4680, 4784, 4968, 4992, 5382, 5520, 5616, 5760, 5888, 5980, 6210, 6240, 6624, 6656, 6912, 7020, 7176, 7360, 7488, 7680, 8073, 8280, 8320, 8640, 8832, 8970, 9360, 9568, 9936, 9984, 10764, 11040, 11232, 11520, 11776, 11960, 12420, 12480, 13248, 13455, 13824, 14040, 14352, 14720, 14976, 16146, 16560, 16640, 17280, 17664, 17940, 18720, 19136, 19872, 19968, 21528, 22080, 22464, 23040, 23920, 24840, 24960, 26496, 26910, 28080, 28704, 29440, 29952, 32292, 33120, 33280, 34560, 35328, 35880, 37440, 38272, 39744, 40365, 43056, 44160, 44928, 47840, 49680, 49920, 52992, 53820, 56160, 57408, 58880, 59904, 64584, 66240, 69120, 71760, 74880, 76544, 79488, 80730, 86112, 88320, 89856, 95680, 99360, 99840, 105984, 107640, 112320, 114816, 129168, 132480, 143520, 149760, 153088, 158976, 161460, 172224, 176640, 179712, 191360, 198720, 215280, 224640, 229632, 258336, 264960, 287040, 299520, 317952, 322920, 344448, 382720, 397440, 430560, 449280, 459264, 516672, 529920, 574080, 645840, 688896, 765440, 794880, 861120, 898560, 1033344, 1148160, 1291680, 1377792, 1589760, 1722240, 2066688, 2296320, 2583360, 3444480, 4133376, 5166720, 6888960, 10333440, 20666880]

約数ペア:

[(1, 20666880), (2, 10333440), (3, 6888960), (4, 5166720), (5, 4133376), (6, 3444480), (8, 2583360), (9, 2296320), (10, 2066688), (12, 1722240), (13, 1589760), (15, 1377792), (16, 1291680), (18, 1148160), (20, 1033344), (23, 898560), (24, 861120), (26, 794880), (27, 765440), (30, 688896), (32, 645840), (36, 574080), (39, 529920), (40, 516672), (45, 459264), (46, 449280), (48, 430560), (52, 397440), (54, 382720), (60, 344448), (64, 322920), (65, 317952), (69, 299520), (72, 287040), (78, 264960), (80, 258336), (90, 229632), (92, 224640), (96, 215280), (104, 198720), (108, 191360), (115, 179712), (117, 176640), (120, 172224), (128, 161460), (130, 158976), (135, 153088), (138, 149760), (144, 143520), (156, 132480), (160, 129168), (180, 114816), (184, 112320), (192, 107640), (195, 105984), (207, 99840), (208, 99360), (216, 95680), (230, 89856), (234, 88320), (240, 86112), (256, 80730), (260, 79488), (270, 76544), (276, 74880), (288, 71760), (299, 69120), (312, 66240), (320, 64584), (345, 59904), (351, 58880), (360, 57408), (368, 56160), (384, 53820), (390, 52992), (414, 49920), (416, 49680), (432, 47840), (460, 44928), (468, 44160), (480, 43056), (512, 40365), (520, 39744), (540, 38272), (552, 37440), (576, 35880), (585, 35328), (598, 34560), (621, 33280), (624, 33120), (640, 32292), (690, 29952), (702, 29440), (720, 28704), (736, 28080), (768, 26910), (780, 26496), (828, 24960), (832, 24840), (864, 23920), (897, 23040), (920, 22464), (936, 22080), (960, 21528), (1035, 19968), (1040, 19872), (1080, 19136), (1104, 18720), (1152, 17940), (1170, 17664), (1196, 17280), (1242, 16640), (1248, 16560), (1280, 16146), (1380, 14976), (1404, 14720), (1440, 14352), (1472, 14040), (1495, 13824), (1536, 13455), (1560, 13248), (1656, 12480), (1664, 12420), (1728, 11960), (1755, 11776), (1794, 11520), (1840, 11232), (1872, 11040), (1920, 10764), (2070, 9984), (2080, 9936), (2160, 9568), (2208, 9360), (2304, 8970), (2340, 8832), (2392, 8640), (2484, 8320), (2496, 8280), (2560, 8073), (2691, 7680), (2760, 7488), (2808, 7360), (2880, 7176), (2944, 7020), (2990, 6912), (3105, 6656), (3120, 6624), (3312, 6240), (3328, 6210), (3456, 5980), (3510, 5888), (3588, 5760), (3680, 5616), (3744, 5520), (3840, 5382), (4140, 4992), (4160, 4968), (4320, 4784), (4416, 4680), (4485, 4608)]