81918720

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{547}}^1$

素因数の和:587

約数の個数: 216

約数和(自身を含む): 305790576

約数和(自身を除く): 223871856

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, 144, 156, 160, 180, 192, 195, 208, 234, 240, 256, 260, 288, 312, 320, 360, 384, 390, 416, 468, 480, 520, 547, 576, 585, 624, 640, 720, 768, 780, 832, 936, 960, 1040, 1094, 1152, 1170, 1248, 1280, 1440, 1560, 1641, 1664, 1872, 1920, 2080, 2188, 2304, 2340, 2496, 2735, 2880, 3120, 3282, 3328, 3744, 3840, 4160, 4376, 4680, 4923, 4992, 5470, 5760, 6240, 6564, 7111, 7488, 8205, 8320, 8752, 9360, 9846, 9984, 10940, 11520, 12480, 13128, 14222, 14976, 16410, 16640, 17504, 18720, 19692, 21333, 21880, 24615, 24960, 26256, 28444, 29952, 32820, 35008, 35555, 37440, 39384, 42666, 43760, 49230, 49920, 52512, 56888, 63999, 65640, 70016, 71110, 74880, 78768, 85332, 87520, 98460, 105024, 106665, 113776, 127998, 131280, 140032, 142220, 149760, 157536, 170664, 175040, 196920, 210048, 213330, 227552, 255996, 262560, 284440, 315072, 319995, 341328, 350080, 393840, 420096, 426660, 455104, 511992, 525120, 568880, 630144, 639990, 682656, 700160, 787680, 853320, 910208, 1023984, 1050240, 1137760, 1260288, 1279980, 1365312, 1575360, 1706640, 1820416, 2047968, 2100480, 2275520, 2559960, 2730624, 3150720, 3413280, 4095936, 4551040, 5119920, 5461248, 6301440, 6826560, 8191872, 9102080, 10239840, 13653120, 16383744, 20479680, 27306240, 40959360, 81918720]

約数ペア:

[(1, 81918720), (2, 40959360), (3, 27306240), (4, 20479680), (5, 16383744), (6, 13653120), (8, 10239840), (9, 9102080), (10, 8191872), (12, 6826560), (13, 6301440), (15, 5461248), (16, 5119920), (18, 4551040), (20, 4095936), (24, 3413280), (26, 3150720), (30, 2730624), (32, 2559960), (36, 2275520), (39, 2100480), (40, 2047968), (45, 1820416), (48, 1706640), (52, 1575360), (60, 1365312), (64, 1279980), (65, 1260288), (72, 1137760), (78, 1050240), (80, 1023984), (90, 910208), (96, 853320), (104, 787680), (117, 700160), (120, 682656), (128, 639990), (130, 630144), (144, 568880), (156, 525120), (160, 511992), (180, 455104), (192, 426660), (195, 420096), (208, 393840), (234, 350080), (240, 341328), (256, 319995), (260, 315072), (288, 284440), (312, 262560), (320, 255996), (360, 227552), (384, 213330), (390, 210048), (416, 196920), (468, 175040), (480, 170664), (520, 157536), (547, 149760), (576, 142220), (585, 140032), (624, 131280), (640, 127998), (720, 113776), (768, 106665), (780, 105024), (832, 98460), (936, 87520), (960, 85332), (1040, 78768), (1094, 74880), (1152, 71110), (1170, 70016), (1248, 65640), (1280, 63999), (1440, 56888), (1560, 52512), (1641, 49920), (1664, 49230), (1872, 43760), (1920, 42666), (2080, 39384), (2188, 37440), (2304, 35555), (2340, 35008), (2496, 32820), (2735, 29952), (2880, 28444), (3120, 26256), (3282, 24960), (3328, 24615), (3744, 21880), (3840, 21333), (4160, 19692), (4376, 18720), (4680, 17504), (4923, 16640), (4992, 16410), (5470, 14976), (5760, 14222), (6240, 13128), (6564, 12480), (7111, 11520), (7488, 10940), (8205, 9984), (8320, 9846), (8752, 9360)]