81091920

素因数分解:

$2^4\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:162

約数の個数: 320

約数和(自身を含む): 319979520

約数和(自身を除く): 238887600

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 13, 14, 15, 16, 20, 21, 24, 26, 28, 30, 35, 39, 40, 42, 47, 48, 52, 56, 60, 65, 70, 78, 79, 80, 84, 91, 94, 104, 105, 112, 120, 130, 140, 141, 156, 158, 168, 182, 188, 195, 208, 210, 235, 237, 240, 260, 273, 280, 282, 312, 316, 329, 336, 364, 376, 390, 395, 420, 455, 470, 474, 520, 546, 553, 560, 564, 611, 624, 632, 658, 705, 728, 752, 780, 790, 840, 910, 940, 948, 987, 1027, 1040, 1092, 1106, 1128, 1185, 1222, 1264, 1316, 1365, 1410, 1456, 1560, 1580, 1645, 1659, 1680, 1820, 1833, 1880, 1896, 1974, 2054, 2184, 2212, 2256, 2370, 2444, 2632, 2730, 2765, 2820, 3055, 3081, 3120, 3160, 3290, 3318, 3640, 3666, 3713, 3760, 3792, 3948, 4108, 4277, 4368, 4424, 4740, 4888, 4935, 5135, 5264, 5460, 5530, 5640, 6110, 6162, 6320, 6580, 6636, 7189, 7280, 7332, 7426, 7896, 8216, 8295, 8554, 8848, 9165, 9480, 9776, 9870, 10270, 10920, 11060, 11139, 11280, 12220, 12324, 12831, 13160, 13272, 14378, 14664, 14852, 15405, 15792, 16432, 16590, 17108, 18330, 18565, 18960, 19740, 20540, 21385, 21567, 21840, 22120, 22278, 24440, 24648, 25662, 25991, 26320, 26544, 28756, 29328, 29704, 30810, 33180, 34216, 35945, 36660, 37130, 39480, 41080, 42770, 43134, 44240, 44556, 48269, 48880, 49296, 51324, 51982, 55695, 57512, 59408, 61620, 64155, 66360, 68432, 71890, 73320, 74260, 77973, 78960, 82160, 85540, 86268, 89112, 96538, 102648, 103964, 107835, 111390, 115024, 123240, 128310, 129955, 132720, 143780, 144807, 146640, 148520, 155946, 171080, 172536, 178224, 193076, 205296, 207928, 215670, 222780, 241345, 246480, 256620, 259910, 287560, 289614, 297040, 311892, 337883, 342160, 345072, 386152, 389865, 415856, 431340, 445560, 482690, 513240, 519820, 575120, 579228, 623784, 675766, 724035, 772304, 779730, 862680, 891120, 965380, 1013649, 1026480, 1039640, 1158456, 1247568, 1351532, 1448070, 1559460, 1689415, 1725360, 1930760, 2027298, 2079280, 2316912, 2703064, 2896140, 3118920, 3378830, 3861520, 4054596, 5068245, 5406128, 5792280, 6237840, 6757660, 8109192, 10136490, 11584560, 13515320, 16218384, 20272980, 27030640, 40545960, 81091920]

約数ペア:

[(1, 81091920), (2, 40545960), (3, 27030640), (4, 20272980), (5, 16218384), (6, 13515320), (7, 11584560), (8, 10136490), (10, 8109192), (12, 6757660), (13, 6237840), (14, 5792280), (15, 5406128), (16, 5068245), (20, 4054596), (21, 3861520), (24, 3378830), (26, 3118920), (28, 2896140), (30, 2703064), (35, 2316912), (39, 2079280), (40, 2027298), (42, 1930760), (47, 1725360), (48, 1689415), (52, 1559460), (56, 1448070), (60, 1351532), (65, 1247568), (70, 1158456), (78, 1039640), (79, 1026480), (80, 1013649), (84, 965380), (91, 891120), (94, 862680), (104, 779730), (105, 772304), (112, 724035), (120, 675766), (130, 623784), (140, 579228), (141, 575120), (156, 519820), (158, 513240), (168, 482690), (182, 445560), (188, 431340), (195, 415856), (208, 389865), (210, 386152), (235, 345072), (237, 342160), (240, 337883), (260, 311892), (273, 297040), (280, 289614), (282, 287560), (312, 259910), (316, 256620), (329, 246480), (336, 241345), (364, 222780), (376, 215670), (390, 207928), (395, 205296), (420, 193076), (455, 178224), (470, 172536), (474, 171080), (520, 155946), (546, 148520), (553, 146640), (560, 144807), (564, 143780), (611, 132720), (624, 129955), (632, 128310), (658, 123240), (705, 115024), (728, 111390), (752, 107835), (780, 103964), (790, 102648), (840, 96538), (910, 89112), (940, 86268), (948, 85540), (987, 82160), (1027, 78960), (1040, 77973), (1092, 74260), (1106, 73320), (1128, 71890), (1185, 68432), (1222, 66360), (1264, 64155), (1316, 61620), (1365, 59408), (1410, 57512), (1456, 55695), (1560, 51982), (1580, 51324), (1645, 49296), (1659, 48880), (1680, 48269), (1820, 44556), (1833, 44240), (1880, 43134), (1896, 42770), (1974, 41080), (2054, 39480), (2184, 37130), (2212, 36660), (2256, 35945), (2370, 34216), (2444, 33180), (2632, 30810), (2730, 29704), (2765, 29328), (2820, 28756), (3055, 26544), (3081, 26320), (3120, 25991), (3160, 25662), (3290, 24648), (3318, 24440), (3640, 22278), (3666, 22120), (3713, 21840), (3760, 21567), (3792, 21385), (3948, 20540), (4108, 19740), (4277, 18960), (4368, 18565), (4424, 18330), (4740, 17108), (4888, 16590), (4935, 16432), (5135, 15792), (5264, 15405), (5460, 14852), (5530, 14664), (5640, 14378), (6110, 13272), (6162, 13160), (6320, 12831), (6580, 12324), (6636, 12220), (7189, 11280), (7280, 11139), (7332, 11060), (7426, 10920), (7896, 10270), (8216, 9870), (8295, 9776), (8554, 9480), (8848, 9165)]