81403920

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{13}}^2\times {\mathrm{223}}^1$

素因数の和:271

約数の個数: 240

約数和(自身を含む): 304980480

約数和(自身を除く): 223576560

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 16, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 48, 52, 54, 60, 65, 72, 78, 80, 90, 104, 108, 117, 120, 130, 135, 144, 156, 169, 180, 195, 208, 216, 223, 234, 240, 260, 270, 312, 338, 351, 360, 390, 432, 446, 468, 507, 520, 540, 585, 624, 669, 676, 702, 720, 780, 845, 892, 936, 1014, 1040, 1080, 1115, 1170, 1338, 1352, 1404, 1521, 1560, 1690, 1755, 1784, 1872, 2007, 2028, 2160, 2230, 2340, 2535, 2676, 2704, 2808, 2899, 3042, 3120, 3345, 3380, 3510, 3568, 4014, 4056, 4460, 4563, 4680, 5070, 5352, 5616, 5798, 6021, 6084, 6690, 6760, 7020, 7605, 8028, 8112, 8697, 8920, 9126, 9360, 10035, 10140, 10704, 11596, 12042, 12168, 13380, 13520, 14040, 14495, 15210, 16056, 17394, 17840, 18252, 20070, 20280, 22815, 23192, 24084, 24336, 26091, 26760, 28080, 28990, 30105, 30420, 32112, 34788, 36504, 37687, 40140, 40560, 43485, 45630, 46384, 48168, 52182, 53520, 57980, 60210, 60840, 69576, 73008, 75374, 78273, 80280, 86970, 91260, 96336, 104364, 113061, 115960, 120420, 121680, 130455, 139152, 150748, 156546, 160560, 173940, 182520, 188435, 208728, 226122, 231920, 240840, 260910, 301496, 313092, 339183, 347880, 365040, 376870, 391365, 417456, 452244, 481680, 521820, 565305, 602992, 626184, 678366, 695760, 753740, 782730, 904488, 1017549, 1043640, 1130610, 1252368, 1356732, 1507480, 1565460, 1695915, 1808976, 2035098, 2087280, 2261220, 2713464, 3014960, 3130920, 3391830, 4070196, 4522440, 5087745, 5426928, 6261840, 6783660, 8140392, 9044880, 10175490, 13567320, 16280784, 20350980, 27134640, 40701960, 81403920]

約数ペア:

[(1, 81403920), (2, 40701960), (3, 27134640), (4, 20350980), (5, 16280784), (6, 13567320), (8, 10175490), (9, 9044880), (10, 8140392), (12, 6783660), (13, 6261840), (15, 5426928), (16, 5087745), (18, 4522440), (20, 4070196), (24, 3391830), (26, 3130920), (27, 3014960), (30, 2713464), (36, 2261220), (39, 2087280), (40, 2035098), (45, 1808976), (48, 1695915), (52, 1565460), (54, 1507480), (60, 1356732), (65, 1252368), (72, 1130610), (78, 1043640), (80, 1017549), (90, 904488), (104, 782730), (108, 753740), (117, 695760), (120, 678366), (130, 626184), (135, 602992), (144, 565305), (156, 521820), (169, 481680), (180, 452244), (195, 417456), (208, 391365), (216, 376870), (223, 365040), (234, 347880), (240, 339183), (260, 313092), (270, 301496), (312, 260910), (338, 240840), (351, 231920), (360, 226122), (390, 208728), (432, 188435), (446, 182520), (468, 173940), (507, 160560), (520, 156546), (540, 150748), (585, 139152), (624, 130455), (669, 121680), (676, 120420), (702, 115960), (720, 113061), (780, 104364), (845, 96336), (892, 91260), (936, 86970), (1014, 80280), (1040, 78273), (1080, 75374), (1115, 73008), (1170, 69576), (1338, 60840), (1352, 60210), (1404, 57980), (1521, 53520), (1560, 52182), (1690, 48168), (1755, 46384), (1784, 45630), (1872, 43485), (2007, 40560), (2028, 40140), (2160, 37687), (2230, 36504), (2340, 34788), (2535, 32112), (2676, 30420), (2704, 30105), (2808, 28990), (2899, 28080), (3042, 26760), (3120, 26091), (3345, 24336), (3380, 24084), (3510, 23192), (3568, 22815), (4014, 20280), (4056, 20070), (4460, 18252), (4563, 17840), (4680, 17394), (5070, 16056), (5352, 15210), (5616, 14495), (5798, 14040), (6021, 13520), (6084, 13380), (6690, 12168), (6760, 12042), (7020, 11596), (7605, 10704), (8028, 10140), (8112, 10035), (8697, 9360), (8920, 9126)]