21265920

素因数分解:

$2^9\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1$

素因数の和:113

約数の個数: 240

約数和(自身を含む): 80432352

約数和(自身を除く): 59166432

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, 71, 72, 78, 80, 90, 96, 104, 117, 120, 128, 130, 142, 144, 156, 160, 180, 192, 195, 208, 213, 234, 240, 256, 260, 284, 288, 312, 320, 355, 360, 384, 390, 416, 426, 468, 480, 512, 520, 568, 576, 585, 624, 639, 640, 710, 720, 768, 780, 832, 852, 923, 936, 960, 1040, 1065, 1136, 1152, 1170, 1248, 1278, 1280, 1420, 1440, 1536, 1560, 1664, 1704, 1846, 1872, 1920, 2080, 2130, 2272, 2304, 2340, 2496, 2556, 2560, 2769, 2840, 2880, 3120, 3195, 3328, 3408, 3692, 3744, 3840, 4160, 4260, 4544, 4608, 4615, 4680, 4992, 5112, 5538, 5680, 5760, 6240, 6390, 6656, 6816, 7384, 7488, 7680, 8307, 8320, 8520, 9088, 9230, 9360, 9984, 10224, 11076, 11360, 11520, 12480, 12780, 13632, 13845, 14768, 14976, 16614, 16640, 17040, 18176, 18460, 18720, 19968, 20448, 22152, 22720, 23040, 24960, 25560, 27264, 27690, 29536, 29952, 33228, 33280, 34080, 36352, 36920, 37440, 40896, 41535, 44304, 45440, 49920, 51120, 54528, 55380, 59072, 59904, 66456, 68160, 73840, 74880, 81792, 83070, 88608, 90880, 99840, 102240, 109056, 110760, 118144, 132912, 136320, 147680, 149760, 163584, 166140, 177216, 181760, 204480, 221520, 236288, 265824, 272640, 295360, 299520, 327168, 332280, 354432, 408960, 443040, 472576, 531648, 545280, 590720, 664560, 708864, 817920, 886080, 1063296, 1181440, 1329120, 1417728, 1635840, 1772160, 2126592, 2362880, 2658240, 3544320, 4253184, 5316480, 7088640, 10632960, 21265920]

約数ペア:

[(1, 21265920), (2, 10632960), (3, 7088640), (4, 5316480), (5, 4253184), (6, 3544320), (8, 2658240), (9, 2362880), (10, 2126592), (12, 1772160), (13, 1635840), (15, 1417728), (16, 1329120), (18, 1181440), (20, 1063296), (24, 886080), (26, 817920), (30, 708864), (32, 664560), (36, 590720), (39, 545280), (40, 531648), (45, 472576), (48, 443040), (52, 408960), (60, 354432), (64, 332280), (65, 327168), (71, 299520), (72, 295360), (78, 272640), (80, 265824), (90, 236288), (96, 221520), (104, 204480), (117, 181760), (120, 177216), (128, 166140), (130, 163584), (142, 149760), (144, 147680), (156, 136320), (160, 132912), (180, 118144), (192, 110760), (195, 109056), (208, 102240), (213, 99840), (234, 90880), (240, 88608), (256, 83070), (260, 81792), (284, 74880), (288, 73840), (312, 68160), (320, 66456), (355, 59904), (360, 59072), (384, 55380), (390, 54528), (416, 51120), (426, 49920), (468, 45440), (480, 44304), (512, 41535), (520, 40896), (568, 37440), (576, 36920), (585, 36352), (624, 34080), (639, 33280), (640, 33228), (710, 29952), (720, 29536), (768, 27690), (780, 27264), (832, 25560), (852, 24960), (923, 23040), (936, 22720), (960, 22152), (1040, 20448), (1065, 19968), (1136, 18720), (1152, 18460), (1170, 18176), (1248, 17040), (1278, 16640), (1280, 16614), (1420, 14976), (1440, 14768), (1536, 13845), (1560, 13632), (1664, 12780), (1704, 12480), (1846, 11520), (1872, 11360), (1920, 11076), (2080, 10224), (2130, 9984), (2272, 9360), (2304, 9230), (2340, 9088), (2496, 8520), (2556, 8320), (2560, 8307), (2769, 7680), (2840, 7488), (2880, 7384), (3120, 6816), (3195, 6656), (3328, 6390), (3408, 6240), (3692, 5760), (3744, 5680), (3840, 5538), (4160, 5112), (4260, 4992), (4544, 4680), (4608, 4615)]