21021840

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{97}}^1$

素因数の和:166

約数の個数: 240

約数和(自身を含む): 83411328

約数和(自身を除く): 62389488

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 35, 36, 40, 42, 43, 45, 48, 56, 60, 63, 70, 72, 80, 84, 86, 90, 97, 105, 112, 120, 126, 129, 140, 144, 168, 172, 180, 194, 210, 215, 240, 252, 258, 280, 291, 301, 315, 336, 344, 360, 387, 388, 420, 430, 485, 504, 516, 560, 582, 602, 630, 645, 679, 688, 720, 774, 776, 840, 860, 873, 903, 970, 1008, 1032, 1164, 1204, 1260, 1290, 1358, 1455, 1505, 1548, 1552, 1680, 1720, 1746, 1806, 1935, 1940, 2037, 2064, 2328, 2408, 2520, 2580, 2709, 2716, 2910, 3010, 3096, 3395, 3440, 3492, 3612, 3870, 3880, 4074, 4171, 4365, 4515, 4656, 4816, 5040, 5160, 5418, 5432, 5820, 6020, 6111, 6192, 6790, 6984, 7224, 7740, 7760, 8148, 8342, 8730, 9030, 10185, 10320, 10836, 10864, 11640, 12040, 12222, 12513, 13545, 13580, 13968, 14448, 15480, 16296, 16684, 17460, 18060, 20370, 20855, 21672, 23280, 24080, 24444, 25026, 27090, 27160, 29197, 30555, 30960, 32592, 33368, 34920, 36120, 37539, 40740, 41710, 43344, 48888, 50052, 54180, 54320, 58394, 61110, 62565, 66736, 69840, 72240, 75078, 81480, 83420, 87591, 97776, 100104, 108360, 116788, 122220, 125130, 145985, 150156, 162960, 166840, 175182, 187695, 200208, 216720, 233576, 244440, 250260, 262773, 291970, 300312, 333680, 350364, 375390, 437955, 467152, 488880, 500520, 525546, 583940, 600624, 700728, 750780, 875910, 1001040, 1051092, 1167880, 1313865, 1401456, 1501560, 1751820, 2102184, 2335760, 2627730, 3003120, 3503640, 4204368, 5255460, 7007280, 10510920, 21021840]

約数ペア:

[(1, 21021840), (2, 10510920), (3, 7007280), (4, 5255460), (5, 4204368), (6, 3503640), (7, 3003120), (8, 2627730), (9, 2335760), (10, 2102184), (12, 1751820), (14, 1501560), (15, 1401456), (16, 1313865), (18, 1167880), (20, 1051092), (21, 1001040), (24, 875910), (28, 750780), (30, 700728), (35, 600624), (36, 583940), (40, 525546), (42, 500520), (43, 488880), (45, 467152), (48, 437955), (56, 375390), (60, 350364), (63, 333680), (70, 300312), (72, 291970), (80, 262773), (84, 250260), (86, 244440), (90, 233576), (97, 216720), (105, 200208), (112, 187695), (120, 175182), (126, 166840), (129, 162960), (140, 150156), (144, 145985), (168, 125130), (172, 122220), (180, 116788), (194, 108360), (210, 100104), (215, 97776), (240, 87591), (252, 83420), (258, 81480), (280, 75078), (291, 72240), (301, 69840), (315, 66736), (336, 62565), (344, 61110), (360, 58394), (387, 54320), (388, 54180), (420, 50052), (430, 48888), (485, 43344), (504, 41710), (516, 40740), (560, 37539), (582, 36120), (602, 34920), (630, 33368), (645, 32592), (679, 30960), (688, 30555), (720, 29197), (774, 27160), (776, 27090), (840, 25026), (860, 24444), (873, 24080), (903, 23280), (970, 21672), (1008, 20855), (1032, 20370), (1164, 18060), (1204, 17460), (1260, 16684), (1290, 16296), (1358, 15480), (1455, 14448), (1505, 13968), (1548, 13580), (1552, 13545), (1680, 12513), (1720, 12222), (1746, 12040), (1806, 11640), (1935, 10864), (1940, 10836), (2037, 10320), (2064, 10185), (2328, 9030), (2408, 8730), (2520, 8342), (2580, 8148), (2709, 7760), (2716, 7740), (2910, 7224), (3010, 6984), (3096, 6790), (3395, 6192), (3440, 6111), (3492, 6020), (3612, 5820), (3870, 5432), (3880, 5418), (4074, 5160), (4171, 5040), (4365, 4816), (4515, 4656)]