81365760

素因数分解:

$2^8\times 3^2\times 5^1\times 7^1\times {\mathrm{1009}}^1$

素因数の和:1043

約数の個数: 216

約数和(自身を含む): 322052640

約数和(自身を除く): 240686880

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, 128, 140, 144, 160, 168, 180, 192, 210, 224, 240, 252, 256, 280, 288, 315, 320, 336, 360, 384, 420, 448, 480, 504, 560, 576, 630, 640, 672, 720, 768, 840, 896, 960, 1008, 1009, 1120, 1152, 1260, 1280, 1344, 1440, 1680, 1792, 1920, 2016, 2018, 2240, 2304, 2520, 2688, 2880, 3027, 3360, 3840, 4032, 4036, 4480, 5040, 5045, 5376, 5760, 6054, 6720, 7063, 8064, 8072, 8960, 9081, 10080, 10090, 11520, 12108, 13440, 14126, 15135, 16128, 16144, 18162, 20160, 20180, 21189, 24216, 26880, 28252, 30270, 32288, 35315, 36324, 40320, 40360, 42378, 45405, 48432, 56504, 60540, 63567, 64576, 70630, 72648, 80640, 80720, 84756, 90810, 96864, 105945, 113008, 121080, 127134, 129152, 141260, 145296, 161440, 169512, 181620, 193728, 211890, 226016, 242160, 254268, 258304, 282520, 290592, 317835, 322880, 339024, 363240, 387456, 423780, 452032, 484320, 508536, 565040, 581184, 635670, 645760, 678048, 726480, 774912, 847560, 904064, 968640, 1017072, 1130080, 1162368, 1271340, 1291520, 1356096, 1452960, 1695120, 1808128, 1937280, 2034144, 2260160, 2324736, 2542680, 2712192, 2905920, 3390240, 3874560, 4068288, 4520320, 5085360, 5424384, 5811840, 6780480, 8136576, 9040640, 10170720, 11623680, 13560960, 16273152, 20341440, 27121920, 40682880, 81365760]

約数ペア:

[(1, 81365760), (2, 40682880), (3, 27121920), (4, 20341440), (5, 16273152), (6, 13560960), (7, 11623680), (8, 10170720), (9, 9040640), (10, 8136576), (12, 6780480), (14, 5811840), (15, 5424384), (16, 5085360), (18, 4520320), (20, 4068288), (21, 3874560), (24, 3390240), (28, 2905920), (30, 2712192), (32, 2542680), (35, 2324736), (36, 2260160), (40, 2034144), (42, 1937280), (45, 1808128), (48, 1695120), (56, 1452960), (60, 1356096), (63, 1291520), (64, 1271340), (70, 1162368), (72, 1130080), (80, 1017072), (84, 968640), (90, 904064), (96, 847560), (105, 774912), (112, 726480), (120, 678048), (126, 645760), (128, 635670), (140, 581184), (144, 565040), (160, 508536), (168, 484320), (180, 452032), (192, 423780), (210, 387456), (224, 363240), (240, 339024), (252, 322880), (256, 317835), (280, 290592), (288, 282520), (315, 258304), (320, 254268), (336, 242160), (360, 226016), (384, 211890), (420, 193728), (448, 181620), (480, 169512), (504, 161440), (560, 145296), (576, 141260), (630, 129152), (640, 127134), (672, 121080), (720, 113008), (768, 105945), (840, 96864), (896, 90810), (960, 84756), (1008, 80720), (1009, 80640), (1120, 72648), (1152, 70630), (1260, 64576), (1280, 63567), (1344, 60540), (1440, 56504), (1680, 48432), (1792, 45405), (1920, 42378), (2016, 40360), (2018, 40320), (2240, 36324), (2304, 35315), (2520, 32288), (2688, 30270), (2880, 28252), (3027, 26880), (3360, 24216), (3840, 21189), (4032, 20180), (4036, 20160), (4480, 18162), (5040, 16144), (5045, 16128), (5376, 15135), (5760, 14126), (6054, 13440), (6720, 12108), (7063, 11520), (8064, 10090), (8072, 10080), (8960, 9081)]