21707280

素因数分解:

$2^4\times 3^2\times 5^1\times 7^1\times {\mathrm{59}}^1\times {\mathrm{73}}^1$

素因数の和:158

約数の個数: 240

約数和(自身を含む): 85887360

約数和(自身を除く): 64180080

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, 45, 48, 56, 59, 60, 63, 70, 72, 73, 80, 84, 90, 105, 112, 118, 120, 126, 140, 144, 146, 168, 177, 180, 210, 219, 236, 240, 252, 280, 292, 295, 315, 336, 354, 360, 365, 413, 420, 438, 472, 504, 511, 531, 560, 584, 590, 630, 657, 708, 720, 730, 826, 840, 876, 885, 944, 1008, 1022, 1062, 1095, 1168, 1180, 1239, 1260, 1314, 1416, 1460, 1533, 1652, 1680, 1752, 1770, 2044, 2065, 2124, 2190, 2360, 2478, 2520, 2555, 2628, 2655, 2832, 2920, 3066, 3285, 3304, 3504, 3540, 3717, 4088, 4130, 4248, 4307, 4380, 4599, 4720, 4956, 5040, 5110, 5256, 5310, 5840, 6132, 6195, 6570, 6608, 7080, 7434, 7665, 8176, 8260, 8496, 8614, 8760, 9198, 9912, 10220, 10512, 10620, 12264, 12390, 12921, 13140, 14160, 14868, 15330, 16520, 17228, 17520, 18396, 18585, 19824, 20440, 21240, 21535, 22995, 24528, 24780, 25842, 26280, 29736, 30149, 30660, 33040, 34456, 36792, 37170, 38763, 40880, 42480, 43070, 45990, 49560, 51684, 52560, 59472, 60298, 61320, 64605, 68912, 73584, 74340, 77526, 86140, 90447, 91980, 99120, 103368, 120596, 122640, 129210, 148680, 150745, 155052, 172280, 180894, 183960, 193815, 206736, 241192, 258420, 271341, 297360, 301490, 310104, 344560, 361788, 367920, 387630, 452235, 482384, 516840, 542682, 602980, 620208, 723576, 775260, 904470, 1033680, 1085364, 1205960, 1356705, 1447152, 1550520, 1808940, 2170728, 2411920, 2713410, 3101040, 3617880, 4341456, 5426820, 7235760, 10853640, 21707280]

約数ペア:

[(1, 21707280), (2, 10853640), (3, 7235760), (4, 5426820), (5, 4341456), (6, 3617880), (7, 3101040), (8, 2713410), (9, 2411920), (10, 2170728), (12, 1808940), (14, 1550520), (15, 1447152), (16, 1356705), (18, 1205960), (20, 1085364), (21, 1033680), (24, 904470), (28, 775260), (30, 723576), (35, 620208), (36, 602980), (40, 542682), (42, 516840), (45, 482384), (48, 452235), (56, 387630), (59, 367920), (60, 361788), (63, 344560), (70, 310104), (72, 301490), (73, 297360), (80, 271341), (84, 258420), (90, 241192), (105, 206736), (112, 193815), (118, 183960), (120, 180894), (126, 172280), (140, 155052), (144, 150745), (146, 148680), (168, 129210), (177, 122640), (180, 120596), (210, 103368), (219, 99120), (236, 91980), (240, 90447), (252, 86140), (280, 77526), (292, 74340), (295, 73584), (315, 68912), (336, 64605), (354, 61320), (360, 60298), (365, 59472), (413, 52560), (420, 51684), (438, 49560), (472, 45990), (504, 43070), (511, 42480), (531, 40880), (560, 38763), (584, 37170), (590, 36792), (630, 34456), (657, 33040), (708, 30660), (720, 30149), (730, 29736), (826, 26280), (840, 25842), (876, 24780), (885, 24528), (944, 22995), (1008, 21535), (1022, 21240), (1062, 20440), (1095, 19824), (1168, 18585), (1180, 18396), (1239, 17520), (1260, 17228), (1314, 16520), (1416, 15330), (1460, 14868), (1533, 14160), (1652, 13140), (1680, 12921), (1752, 12390), (1770, 12264), (2044, 10620), (2065, 10512), (2124, 10220), (2190, 9912), (2360, 9198), (2478, 8760), (2520, 8614), (2555, 8496), (2628, 8260), (2655, 8176), (2832, 7665), (2920, 7434), (3066, 7080), (3285, 6608), (3304, 6570), (3504, 6195), (3540, 6132), (3717, 5840), (4088, 5310), (4130, 5256), (4248, 5110), (4307, 5040), (4380, 4956), (4599, 4720)]