21171520

素因数分解:

$2^6\times 5^1\times {\mathrm{66161}}^1$

素因数の和:66178

約数の個数: 28

約数和(自身を含む): 50415444

約数和(自身を除く): 29243924

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66161, 132322, 264644, 330805, 529288, 661610, 1058576, 1323220, 2117152, 2646440, 4234304, 5292880, 10585760, 21171520]

約数ペア:

[(1, 21171520), (2, 10585760), (4, 5292880), (5, 4234304), (8, 2646440), (10, 2117152), (16, 1323220), (20, 1058576), (32, 661610), (40, 529288), (64, 330805), (80, 264644), (160, 132322), (320, 66161)]