20691520

素因数分解:

$2^6\times 5^1\times {\mathrm{64661}}^1$

素因数の和:64678

約数の個数: 28

約数和(自身を含む): 49272444

約数和(自身を除く): 28580924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 64661, 129322, 258644, 323305, 517288, 646610, 1034576, 1293220, 2069152, 2586440, 4138304, 5172880, 10345760, 20691520]

約数ペア:

[(1, 20691520), (2, 10345760), (4, 5172880), (5, 4138304), (8, 2586440), (10, 2069152), (16, 1293220), (20, 1034576), (32, 646610), (40, 517288), (64, 323305), (80, 258644), (160, 129322), (320, 64661)]