20784960

素因数分解:

$2^6\times 3^2\times 5^1\times 7^1\times {\mathrm{1031}}^1$

素因数の和:1061

約数の個数: 168

約数和(自身を含む): 81783936

約数和(自身を除く): 60998976

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 28, 30, 32, 35, 36, 40, 42, 45, 48, 56, 60, 63, 64, 70, 72, 80, 84, 90, 96, 105, 112, 120, 126, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 280, 288, 315, 320, 336, 360, 420, 448, 480, 504, 560, 576, 630, 672, 720, 840, 960, 1008, 1031, 1120, 1260, 1344, 1440, 1680, 2016, 2062, 2240, 2520, 2880, 3093, 3360, 4032, 4124, 5040, 5155, 6186, 6720, 7217, 8248, 9279, 10080, 10310, 12372, 14434, 15465, 16496, 18558, 20160, 20620, 21651, 24744, 28868, 30930, 32992, 36085, 37116, 41240, 43302, 46395, 49488, 57736, 61860, 64953, 65984, 72170, 74232, 82480, 86604, 92790, 98976, 108255, 115472, 123720, 129906, 144340, 148464, 164960, 173208, 185580, 197952, 216510, 230944, 247440, 259812, 288680, 296928, 324765, 329920, 346416, 371160, 433020, 461888, 494880, 519624, 577360, 593856, 649530, 692832, 742320, 866040, 989760, 1039248, 1154720, 1299060, 1385664, 1484640, 1732080, 2078496, 2309440, 2598120, 2969280, 3464160, 4156992, 5196240, 6928320, 10392480, 20784960]

約数ペア:

[(1, 20784960), (2, 10392480), (3, 6928320), (4, 5196240), (5, 4156992), (6, 3464160), (7, 2969280), (8, 2598120), (9, 2309440), (10, 2078496), (12, 1732080), (14, 1484640), (15, 1385664), (16, 1299060), (18, 1154720), (20, 1039248), (21, 989760), (24, 866040), (28, 742320), (30, 692832), (32, 649530), (35, 593856), (36, 577360), (40, 519624), (42, 494880), (45, 461888), (48, 433020), (56, 371160), (60, 346416), (63, 329920), (64, 324765), (70, 296928), (72, 288680), (80, 259812), (84, 247440), (90, 230944), (96, 216510), (105, 197952), (112, 185580), (120, 173208), (126, 164960), (140, 148464), (144, 144340), (160, 129906), (168, 123720), (180, 115472), (192, 108255), (210, 98976), (224, 92790), (240, 86604), (252, 82480), (280, 74232), (288, 72170), (315, 65984), (320, 64953), (336, 61860), (360, 57736), (420, 49488), (448, 46395), (480, 43302), (504, 41240), (560, 37116), (576, 36085), (630, 32992), (672, 30930), (720, 28868), (840, 24744), (960, 21651), (1008, 20620), (1031, 20160), (1120, 18558), (1260, 16496), (1344, 15465), (1440, 14434), (1680, 12372), (2016, 10310), (2062, 10080), (2240, 9279), (2520, 8248), (2880, 7217), (3093, 6720), (3360, 6186), (4032, 5155), (4124, 5040)]