21000547728

素因数分解:

$2^4\times 3^3\times {\mathrm{73}}^1\times {\mathrm{665923}}^1$

素因数の和:666013

約数の個数: 80

約数和(自身を含む): 61105186240

約数和(自身を除く): 40104638512

約数列:

[1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 36, 48, 54, 72, 73, 108, 144, 146, 216, 219, 292, 432, 438, 584, 657, 876, 1168, 1314, 1752, 1971, 2628, 3504, 3942, 5256, 7884, 10512, 15768, 31536, 665923, 1331846, 1997769, 2663692, 3995538, 5327384, 5993307, 7991076, 10654768, 11986614, 15982152, 17979921, 23973228, 31964304, 35959842, 47946456, 48612379, 71919684, 95892912, 97224758, 143839368, 145837137, 194449516, 287678736, 291674274, 388899032, 437511411, 583348548, 777798064, 875022822, 1166697096, 1312534233, 1750045644, 2333394192, 2625068466, 3500091288, 5250136932, 7000182576, 10500273864, 21000547728]

約数ペア:

[(1, 21000547728), (2, 10500273864), (3, 7000182576), (4, 5250136932), (6, 3500091288), (8, 2625068466), (9, 2333394192), (12, 1750045644), (16, 1312534233), (18, 1166697096), (24, 875022822), (27, 777798064), (36, 583348548), (48, 437511411), (54, 388899032), (72, 291674274), (73, 287678736), (108, 194449516), (144, 145837137), (146, 143839368), (216, 97224758), (219, 95892912), (292, 71919684), (432, 48612379), (438, 47946456), (584, 35959842), (657, 31964304), (876, 23973228), (1168, 17979921), (1314, 15982152), (1752, 11986614), (1971, 10654768), (2628, 7991076), (3504, 5993307), (3942, 5327384), (5256, 3995538), (7884, 2663692), (10512, 1997769), (15768, 1331846), (31536, 665923)]