81805440

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{311}}^1$

素因数の和:470

約数の個数: 128

約数和(自身を含む): 263502720

約数和(自身を除く): 181697280

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 32, 40, 48, 60, 64, 80, 96, 120, 128, 137, 160, 192, 240, 274, 311, 320, 384, 411, 480, 548, 622, 640, 685, 822, 933, 960, 1096, 1244, 1370, 1555, 1644, 1866, 1920, 2055, 2192, 2488, 2740, 3110, 3288, 3732, 4110, 4384, 4665, 4976, 5480, 6220, 6576, 7464, 8220, 8768, 9330, 9952, 10960, 12440, 13152, 14928, 16440, 17536, 18660, 19904, 21920, 24880, 26304, 29856, 32880, 37320, 39808, 42607, 43840, 49760, 52608, 59712, 65760, 74640, 85214, 87680, 99520, 119424, 127821, 131520, 149280, 170428, 199040, 213035, 255642, 263040, 298560, 340856, 426070, 511284, 597120, 639105, 681712, 852140, 1022568, 1278210, 1363424, 1704280, 2045136, 2556420, 2726848, 3408560, 4090272, 5112840, 5453696, 6817120, 8180544, 10225680, 13634240, 16361088, 20451360, 27268480, 40902720, 81805440]

約数ペア:

[(1, 81805440), (2, 40902720), (3, 27268480), (4, 20451360), (5, 16361088), (6, 13634240), (8, 10225680), (10, 8180544), (12, 6817120), (15, 5453696), (16, 5112840), (20, 4090272), (24, 3408560), (30, 2726848), (32, 2556420), (40, 2045136), (48, 1704280), (60, 1363424), (64, 1278210), (80, 1022568), (96, 852140), (120, 681712), (128, 639105), (137, 597120), (160, 511284), (192, 426070), (240, 340856), (274, 298560), (311, 263040), (320, 255642), (384, 213035), (411, 199040), (480, 170428), (548, 149280), (622, 131520), (640, 127821), (685, 119424), (822, 99520), (933, 87680), (960, 85214), (1096, 74640), (1244, 65760), (1370, 59712), (1555, 52608), (1644, 49760), (1866, 43840), (1920, 42607), (2055, 39808), (2192, 37320), (2488, 32880), (2740, 29856), (3110, 26304), (3288, 24880), (3732, 21920), (4110, 19904), (4384, 18660), (4665, 17536), (4976, 16440), (5480, 14928), (6220, 13152), (6576, 12440), (7464, 10960), (8220, 9952), (8768, 9330)]