81409920

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{109}}^1\times {\mathrm{389}}^1$

素因数の和:520

約数の個数: 128

約数和(自身を含む): 262548000

約数和(自身を除く): 181138080

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 109, 120, 128, 160, 192, 218, 240, 320, 327, 384, 389, 436, 480, 545, 640, 654, 778, 872, 960, 1090, 1167, 1308, 1556, 1635, 1744, 1920, 1945, 2180, 2334, 2616, 3112, 3270, 3488, 3890, 4360, 4668, 5232, 5835, 6224, 6540, 6976, 7780, 8720, 9336, 10464, 11670, 12448, 13080, 13952, 15560, 17440, 18672, 20928, 23340, 24896, 26160, 31120, 34880, 37344, 41856, 42401, 46680, 49792, 52320, 62240, 69760, 74688, 84802, 93360, 104640, 124480, 127203, 149376, 169604, 186720, 209280, 212005, 248960, 254406, 339208, 373440, 424010, 508812, 636015, 678416, 746880, 848020, 1017624, 1272030, 1356832, 1696040, 2035248, 2544060, 2713664, 3392080, 4070496, 5088120, 5427328, 6784160, 8140992, 10176240, 13568320, 16281984, 20352480, 27136640, 40704960, 81409920]

約数ペア:

[(1, 81409920), (2, 40704960), (3, 27136640), (4, 20352480), (5, 16281984), (6, 13568320), (8, 10176240), (10, 8140992), (12, 6784160), (15, 5427328), (16, 5088120), (20, 4070496), (24, 3392080), (30, 2713664), (32, 2544060), (40, 2035248), (48, 1696040), (60, 1356832), (64, 1272030), (80, 1017624), (96, 848020), (109, 746880), (120, 678416), (128, 636015), (160, 508812), (192, 424010), (218, 373440), (240, 339208), (320, 254406), (327, 248960), (384, 212005), (389, 209280), (436, 186720), (480, 169604), (545, 149376), (640, 127203), (654, 124480), (778, 104640), (872, 93360), (960, 84802), (1090, 74688), (1167, 69760), (1308, 62240), (1556, 52320), (1635, 49792), (1744, 46680), (1920, 42401), (1945, 41856), (2180, 37344), (2334, 34880), (2616, 31120), (3112, 26160), (3270, 24896), (3488, 23340), (3890, 20928), (4360, 18672), (4668, 17440), (5232, 15560), (5835, 13952), (6224, 13080), (6540, 12448), (6976, 11670), (7780, 10464), (8720, 9336)]