21148976

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{953}}^1$

素因数の和:1053

約数の個数: 40

約数和(自身を含む): 43769520

約数和(自身を除く): 22620544

約数列:

[1, 2, 4, 8, 16, 19, 38, 73, 76, 146, 152, 292, 304, 584, 953, 1168, 1387, 1906, 2774, 3812, 5548, 7624, 11096, 15248, 18107, 22192, 36214, 69569, 72428, 139138, 144856, 278276, 289712, 556552, 1113104, 1321811, 2643622, 5287244, 10574488, 21148976]

約数ペア:

[(1, 21148976), (2, 10574488), (4, 5287244), (8, 2643622), (16, 1321811), (19, 1113104), (38, 556552), (73, 289712), (76, 278276), (146, 144856), (152, 139138), (292, 72428), (304, 69569), (584, 36214), (953, 22192), (1168, 18107), (1387, 15248), (1906, 11096), (2774, 7624), (3812, 5548)]