21787920

素因数分解:

$2^4\times 3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1$

素因数の和:171

約数の個数: 320

約数和(自身を含む): 94279680

約数和(自身を除く): 72491760

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 22, 24, 27, 28, 30, 33, 35, 36, 40, 42, 44, 45, 48, 54, 55, 56, 60, 63, 66, 70, 72, 77, 80, 84, 88, 90, 99, 105, 108, 110, 112, 120, 126, 131, 132, 135, 140, 144, 154, 165, 168, 176, 180, 189, 198, 210, 216, 220, 231, 240, 252, 262, 264, 270, 280, 297, 308, 315, 330, 336, 360, 378, 385, 393, 396, 420, 432, 440, 462, 495, 504, 524, 528, 540, 560, 594, 616, 630, 655, 660, 693, 720, 756, 770, 786, 792, 840, 880, 917, 924, 945, 990, 1008, 1048, 1080, 1155, 1179, 1188, 1232, 1260, 1310, 1320, 1386, 1441, 1485, 1512, 1540, 1572, 1584, 1680, 1834, 1848, 1890, 1965, 1980, 2079, 2096, 2160, 2310, 2358, 2376, 2520, 2620, 2640, 2751, 2772, 2882, 2970, 3024, 3080, 3144, 3465, 3537, 3668, 3696, 3780, 3930, 3960, 4158, 4323, 4585, 4620, 4716, 4752, 5040, 5240, 5502, 5544, 5764, 5895, 5940, 6160, 6288, 6930, 7074, 7205, 7336, 7560, 7860, 7920, 8253, 8316, 8646, 9170, 9240, 9432, 10087, 10395, 10480, 11004, 11088, 11528, 11790, 11880, 12969, 13755, 13860, 14148, 14410, 14672, 15120, 15720, 16506, 16632, 17292, 17685, 18340, 18480, 18864, 20174, 20790, 21615, 22008, 23056, 23580, 23760, 24759, 25938, 27510, 27720, 28296, 28820, 30261, 31440, 33012, 33264, 34584, 35370, 36680, 38907, 40348, 41265, 41580, 43230, 44016, 47160, 49518, 50435, 51876, 55020, 55440, 56592, 57640, 60522, 64845, 66024, 69168, 70740, 73360, 77814, 80696, 82530, 83160, 86460, 90783, 94320, 99036, 100870, 103752, 110040, 115280, 121044, 123795, 129690, 132048, 141480, 151305, 155628, 161392, 165060, 166320, 172920, 181566, 194535, 198072, 201740, 207504, 220080, 242088, 247590, 259380, 272349, 282960, 302610, 311256, 330120, 345840, 363132, 389070, 396144, 403480, 453915, 484176, 495180, 518760, 544698, 605220, 622512, 660240, 726264, 778140, 806960, 907830, 990360, 1037520, 1089396, 1210440, 1361745, 1452528, 1556280, 1815660, 1980720, 2178792, 2420880, 2723490, 3112560, 3631320, 4357584, 5446980, 7262640, 10893960, 21787920]

約数ペア:

[(1, 21787920), (2, 10893960), (3, 7262640), (4, 5446980), (5, 4357584), (6, 3631320), (7, 3112560), (8, 2723490), (9, 2420880), (10, 2178792), (11, 1980720), (12, 1815660), (14, 1556280), (15, 1452528), (16, 1361745), (18, 1210440), (20, 1089396), (21, 1037520), (22, 990360), (24, 907830), (27, 806960), (28, 778140), (30, 726264), (33, 660240), (35, 622512), (36, 605220), (40, 544698), (42, 518760), (44, 495180), (45, 484176), (48, 453915), (54, 403480), (55, 396144), (56, 389070), (60, 363132), (63, 345840), (66, 330120), (70, 311256), (72, 302610), (77, 282960), (80, 272349), (84, 259380), (88, 247590), (90, 242088), (99, 220080), (105, 207504), (108, 201740), (110, 198072), (112, 194535), (120, 181566), (126, 172920), (131, 166320), (132, 165060), (135, 161392), (140, 155628), (144, 151305), (154, 141480), (165, 132048), (168, 129690), (176, 123795), (180, 121044), (189, 115280), (198, 110040), (210, 103752), (216, 100870), (220, 99036), (231, 94320), (240, 90783), (252, 86460), (262, 83160), (264, 82530), (270, 80696), (280, 77814), (297, 73360), (308, 70740), (315, 69168), (330, 66024), (336, 64845), (360, 60522), (378, 57640), (385, 56592), (393, 55440), (396, 55020), (420, 51876), (432, 50435), (440, 49518), (462, 47160), (495, 44016), (504, 43230), (524, 41580), (528, 41265), (540, 40348), (560, 38907), (594, 36680), (616, 35370), (630, 34584), (655, 33264), (660, 33012), (693, 31440), (720, 30261), (756, 28820), (770, 28296), (786, 27720), (792, 27510), (840, 25938), (880, 24759), (917, 23760), (924, 23580), (945, 23056), (990, 22008), (1008, 21615), (1048, 20790), (1080, 20174), (1155, 18864), (1179, 18480), (1188, 18340), (1232, 17685), (1260, 17292), (1310, 16632), (1320, 16506), (1386, 15720), (1441, 15120), (1485, 14672), (1512, 14410), (1540, 14148), (1572, 13860), (1584, 13755), (1680, 12969), (1834, 11880), (1848, 11790), (1890, 11528), (1965, 11088), (1980, 11004), (2079, 10480), (2096, 10395), (2160, 10087), (2310, 9432), (2358, 9240), (2376, 9170), (2520, 8646), (2620, 8316), (2640, 8253), (2751, 7920), (2772, 7860), (2882, 7560), (2970, 7336), (3024, 7205), (3080, 7074), (3144, 6930), (3465, 6288), (3537, 6160), (3668, 5940), (3696, 5895), (3780, 5764), (3930, 5544), (3960, 5502), (4158, 5240), (4323, 5040), (4585, 4752), (4620, 4716)]