20507520

素因数分解:

$2^7\times 3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{971}}^1$

素因数の和:1004

約数の個数: 128

約数和(自身を含む): 71383680

約数和(自身を除く): 50876160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 16, 20, 22, 24, 30, 32, 33, 40, 44, 48, 55, 60, 64, 66, 80, 88, 96, 110, 120, 128, 132, 160, 165, 176, 192, 220, 240, 264, 320, 330, 352, 384, 440, 480, 528, 640, 660, 704, 880, 960, 971, 1056, 1320, 1408, 1760, 1920, 1942, 2112, 2640, 2913, 3520, 3884, 4224, 4855, 5280, 5826, 7040, 7768, 9710, 10560, 10681, 11652, 14565, 15536, 19420, 21120, 21362, 23304, 29130, 31072, 32043, 38840, 42724, 46608, 53405, 58260, 62144, 64086, 77680, 85448, 93216, 106810, 116520, 124288, 128172, 155360, 160215, 170896, 186432, 213620, 233040, 256344, 310720, 320430, 341792, 372864, 427240, 466080, 512688, 621440, 640860, 683584, 854480, 932160, 1025376, 1281720, 1367168, 1708960, 1864320, 2050752, 2563440, 3417920, 4101504, 5126880, 6835840, 10253760, 20507520]

約数ペア:

[(1, 20507520), (2, 10253760), (3, 6835840), (4, 5126880), (5, 4101504), (6, 3417920), (8, 2563440), (10, 2050752), (11, 1864320), (12, 1708960), (15, 1367168), (16, 1281720), (20, 1025376), (22, 932160), (24, 854480), (30, 683584), (32, 640860), (33, 621440), (40, 512688), (44, 466080), (48, 427240), (55, 372864), (60, 341792), (64, 320430), (66, 310720), (80, 256344), (88, 233040), (96, 213620), (110, 186432), (120, 170896), (128, 160215), (132, 155360), (160, 128172), (165, 124288), (176, 116520), (192, 106810), (220, 93216), (240, 85448), (264, 77680), (320, 64086), (330, 62144), (352, 58260), (384, 53405), (440, 46608), (480, 42724), (528, 38840), (640, 32043), (660, 31072), (704, 29130), (880, 23304), (960, 21362), (971, 21120), (1056, 19420), (1320, 15536), (1408, 14565), (1760, 11652), (1920, 10681), (1942, 10560), (2112, 9710), (2640, 7768), (2913, 7040), (3520, 5826), (3884, 5280), (4224, 4855)]