21955760

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{2161}}^1$

素因数の和:2301

約数の個数: 40

約数和(自身を含む): 51472896

約数和(自身を除く): 29517136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 2032, 2161, 2540, 4322, 5080, 8644, 10160, 10805, 17288, 21610, 34576, 43220, 86440, 172880, 274447, 548894, 1097788, 1372235, 2195576, 2744470, 4391152, 5488940, 10977880, 21955760]

約数ペア:

[(1, 21955760), (2, 10977880), (4, 5488940), (5, 4391152), (8, 2744470), (10, 2195576), (16, 1372235), (20, 1097788), (40, 548894), (80, 274447), (127, 172880), (254, 86440), (508, 43220), (635, 34576), (1016, 21610), (1270, 17288), (2032, 10805), (2161, 10160), (2540, 8644), (4322, 5080)]