81211320

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{383}}^1$

素因数の和:450

約数の個数: 192

約数和(自身を含む): 287539200

約数和(自身を除く): 206327880

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 19, 20, 24, 30, 31, 36, 38, 40, 45, 57, 60, 62, 72, 76, 90, 93, 95, 114, 120, 124, 152, 155, 171, 180, 186, 190, 228, 248, 279, 285, 310, 342, 360, 372, 380, 383, 456, 465, 558, 570, 589, 620, 684, 744, 760, 766, 855, 930, 1116, 1140, 1149, 1178, 1240, 1368, 1395, 1532, 1710, 1767, 1860, 1915, 2232, 2280, 2298, 2356, 2790, 2945, 3064, 3420, 3447, 3534, 3720, 3830, 4596, 4712, 5301, 5580, 5745, 5890, 6840, 6894, 7068, 7277, 7660, 8835, 9192, 10602, 11160, 11490, 11780, 11873, 13788, 14136, 14554, 15320, 17235, 17670, 21204, 21831, 22980, 23560, 23746, 26505, 27576, 29108, 34470, 35340, 35619, 36385, 42408, 43662, 45960, 47492, 53010, 58216, 59365, 65493, 68940, 70680, 71238, 72770, 87324, 94984, 106020, 106857, 109155, 118730, 130986, 137880, 142476, 145540, 174648, 178095, 212040, 213714, 218310, 225587, 237460, 261972, 284952, 291080, 327465, 356190, 427428, 436620, 451174, 474920, 523944, 534285, 654930, 676761, 712380, 854856, 873240, 902348, 1068570, 1127935, 1309860, 1353522, 1424760, 1804696, 2030283, 2137140, 2255870, 2619720, 2707044, 3383805, 4060566, 4274280, 4511740, 5414088, 6767610, 8121132, 9023480, 10151415, 13535220, 16242264, 20302830, 27070440, 40605660, 81211320]

約数ペア:

[(1, 81211320), (2, 40605660), (3, 27070440), (4, 20302830), (5, 16242264), (6, 13535220), (8, 10151415), (9, 9023480), (10, 8121132), (12, 6767610), (15, 5414088), (18, 4511740), (19, 4274280), (20, 4060566), (24, 3383805), (30, 2707044), (31, 2619720), (36, 2255870), (38, 2137140), (40, 2030283), (45, 1804696), (57, 1424760), (60, 1353522), (62, 1309860), (72, 1127935), (76, 1068570), (90, 902348), (93, 873240), (95, 854856), (114, 712380), (120, 676761), (124, 654930), (152, 534285), (155, 523944), (171, 474920), (180, 451174), (186, 436620), (190, 427428), (228, 356190), (248, 327465), (279, 291080), (285, 284952), (310, 261972), (342, 237460), (360, 225587), (372, 218310), (380, 213714), (383, 212040), (456, 178095), (465, 174648), (558, 145540), (570, 142476), (589, 137880), (620, 130986), (684, 118730), (744, 109155), (760, 106857), (766, 106020), (855, 94984), (930, 87324), (1116, 72770), (1140, 71238), (1149, 70680), (1178, 68940), (1240, 65493), (1368, 59365), (1395, 58216), (1532, 53010), (1710, 47492), (1767, 45960), (1860, 43662), (1915, 42408), (2232, 36385), (2280, 35619), (2298, 35340), (2356, 34470), (2790, 29108), (2945, 27576), (3064, 26505), (3420, 23746), (3447, 23560), (3534, 22980), (3720, 21831), (3830, 21204), (4596, 17670), (4712, 17235), (5301, 15320), (5580, 14554), (5745, 14136), (5890, 13788), (6840, 11873), (6894, 11780), (7068, 11490), (7277, 11160), (7660, 10602), (8835, 9192)]