21991680

素因数分解:

$2^8\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1$

素因数の和:133

約数の個数: 216

約数和(自身を含む): 80353728

約数和(自身を除く): 58362048

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 23, 24, 30, 32, 36, 40, 45, 46, 48, 60, 64, 69, 72, 80, 83, 90, 92, 96, 115, 120, 128, 138, 144, 160, 166, 180, 184, 192, 207, 230, 240, 249, 256, 276, 288, 320, 332, 345, 360, 368, 384, 414, 415, 460, 480, 498, 552, 576, 640, 664, 690, 720, 736, 747, 768, 828, 830, 920, 960, 996, 1035, 1104, 1152, 1245, 1280, 1328, 1380, 1440, 1472, 1494, 1656, 1660, 1840, 1909, 1920, 1992, 2070, 2208, 2304, 2490, 2656, 2760, 2880, 2944, 2988, 3312, 3320, 3680, 3735, 3818, 3840, 3984, 4140, 4416, 4980, 5312, 5520, 5727, 5760, 5888, 5976, 6624, 6640, 7360, 7470, 7636, 7968, 8280, 8832, 9545, 9960, 10624, 11040, 11454, 11520, 11952, 13248, 13280, 14720, 14940, 15272, 15936, 16560, 17181, 17664, 19090, 19920, 21248, 22080, 22908, 23904, 26496, 26560, 28635, 29440, 29880, 30544, 31872, 33120, 34362, 38180, 39840, 44160, 45816, 47808, 52992, 53120, 57270, 59760, 61088, 63744, 66240, 68724, 76360, 79680, 85905, 88320, 91632, 95616, 106240, 114540, 119520, 122176, 132480, 137448, 152720, 159360, 171810, 183264, 191232, 229080, 239040, 244352, 264960, 274896, 305440, 318720, 343620, 366528, 458160, 478080, 488704, 549792, 610880, 687240, 733056, 916320, 956160, 1099584, 1221760, 1374480, 1466112, 1832640, 2199168, 2443520, 2748960, 3665280, 4398336, 5497920, 7330560, 10995840, 21991680]

約数ペア:

[(1, 21991680), (2, 10995840), (3, 7330560), (4, 5497920), (5, 4398336), (6, 3665280), (8, 2748960), (9, 2443520), (10, 2199168), (12, 1832640), (15, 1466112), (16, 1374480), (18, 1221760), (20, 1099584), (23, 956160), (24, 916320), (30, 733056), (32, 687240), (36, 610880), (40, 549792), (45, 488704), (46, 478080), (48, 458160), (60, 366528), (64, 343620), (69, 318720), (72, 305440), (80, 274896), (83, 264960), (90, 244352), (92, 239040), (96, 229080), (115, 191232), (120, 183264), (128, 171810), (138, 159360), (144, 152720), (160, 137448), (166, 132480), (180, 122176), (184, 119520), (192, 114540), (207, 106240), (230, 95616), (240, 91632), (249, 88320), (256, 85905), (276, 79680), (288, 76360), (320, 68724), (332, 66240), (345, 63744), (360, 61088), (368, 59760), (384, 57270), (414, 53120), (415, 52992), (460, 47808), (480, 45816), (498, 44160), (552, 39840), (576, 38180), (640, 34362), (664, 33120), (690, 31872), (720, 30544), (736, 29880), (747, 29440), (768, 28635), (828, 26560), (830, 26496), (920, 23904), (960, 22908), (996, 22080), (1035, 21248), (1104, 19920), (1152, 19090), (1245, 17664), (1280, 17181), (1328, 16560), (1380, 15936), (1440, 15272), (1472, 14940), (1494, 14720), (1656, 13280), (1660, 13248), (1840, 11952), (1909, 11520), (1920, 11454), (1992, 11040), (2070, 10624), (2208, 9960), (2304, 9545), (2490, 8832), (2656, 8280), (2760, 7968), (2880, 7636), (2944, 7470), (2988, 7360), (3312, 6640), (3320, 6624), (3680, 5976), (3735, 5888), (3818, 5760), (3840, 5727), (3984, 5520), (4140, 5312), (4416, 4980)]