20509440

素因数分解:

$2^8\times 3^1\times 5^1\times 7^2\times {\mathrm{109}}^1$

素因数の和:147

約数の個数: 216

約数和(自身を含む): 76895280

約数和(自身を除く): 56385840

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 30, 32, 35, 40, 42, 48, 49, 56, 60, 64, 70, 80, 84, 96, 98, 105, 109, 112, 120, 128, 140, 147, 160, 168, 192, 196, 210, 218, 224, 240, 245, 256, 280, 294, 320, 327, 336, 384, 392, 420, 436, 448, 480, 490, 545, 560, 588, 640, 654, 672, 735, 763, 768, 784, 840, 872, 896, 960, 980, 1090, 1120, 1176, 1280, 1308, 1344, 1470, 1526, 1568, 1635, 1680, 1744, 1792, 1920, 1960, 2180, 2240, 2289, 2352, 2616, 2688, 2940, 3052, 3136, 3270, 3360, 3488, 3815, 3840, 3920, 4360, 4480, 4578, 4704, 5232, 5341, 5376, 5880, 6104, 6272, 6540, 6720, 6976, 7630, 7840, 8720, 8960, 9156, 9408, 10464, 10682, 11445, 11760, 12208, 12544, 13080, 13440, 13952, 15260, 15680, 16023, 17440, 18312, 18816, 20928, 21364, 22890, 23520, 24416, 26160, 26705, 26880, 27904, 30520, 31360, 32046, 34880, 36624, 37632, 41856, 42728, 45780, 47040, 48832, 52320, 53410, 61040, 62720, 64092, 69760, 73248, 80115, 83712, 85456, 91560, 94080, 97664, 104640, 106820, 122080, 128184, 139520, 146496, 160230, 170912, 183120, 188160, 195328, 209280, 213640, 244160, 256368, 292992, 320460, 341824, 366240, 418560, 427280, 488320, 512736, 585984, 640920, 683648, 732480, 854560, 976640, 1025472, 1281840, 1367296, 1464960, 1709120, 2050944, 2563680, 2929920, 3418240, 4101888, 5127360, 6836480, 10254720, 20509440]

約数ペア:

[(1, 20509440), (2, 10254720), (3, 6836480), (4, 5127360), (5, 4101888), (6, 3418240), (7, 2929920), (8, 2563680), (10, 2050944), (12, 1709120), (14, 1464960), (15, 1367296), (16, 1281840), (20, 1025472), (21, 976640), (24, 854560), (28, 732480), (30, 683648), (32, 640920), (35, 585984), (40, 512736), (42, 488320), (48, 427280), (49, 418560), (56, 366240), (60, 341824), (64, 320460), (70, 292992), (80, 256368), (84, 244160), (96, 213640), (98, 209280), (105, 195328), (109, 188160), (112, 183120), (120, 170912), (128, 160230), (140, 146496), (147, 139520), (160, 128184), (168, 122080), (192, 106820), (196, 104640), (210, 97664), (218, 94080), (224, 91560), (240, 85456), (245, 83712), (256, 80115), (280, 73248), (294, 69760), (320, 64092), (327, 62720), (336, 61040), (384, 53410), (392, 52320), (420, 48832), (436, 47040), (448, 45780), (480, 42728), (490, 41856), (545, 37632), (560, 36624), (588, 34880), (640, 32046), (654, 31360), (672, 30520), (735, 27904), (763, 26880), (768, 26705), (784, 26160), (840, 24416), (872, 23520), (896, 22890), (960, 21364), (980, 20928), (1090, 18816), (1120, 18312), (1176, 17440), (1280, 16023), (1308, 15680), (1344, 15260), (1470, 13952), (1526, 13440), (1568, 13080), (1635, 12544), (1680, 12208), (1744, 11760), (1792, 11445), (1920, 10682), (1960, 10464), (2180, 9408), (2240, 9156), (2289, 8960), (2352, 8720), (2616, 7840), (2688, 7630), (2940, 6976), (3052, 6720), (3136, 6540), (3270, 6272), (3360, 6104), (3488, 5880), (3815, 5376), (3840, 5341), (3920, 5232), (4360, 4704), (4480, 4578)]