19996806005

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{113}}^1\times {\mathrm{45317}}^1$

素因数の和:45517

約数の個数: 32

約数和(自身を含む): 26781850368

約数和(自身を除く): 6785044363

約数列:

[1, 5, 11, 55, 71, 113, 355, 565, 781, 1243, 3905, 6215, 8023, 40115, 45317, 88253, 226585, 441265, 498487, 2492435, 3217507, 5120821, 16087535, 25604105, 35392577, 56329031, 176962885, 281645155, 363578291, 1817891455, 3999361201, 19996806005]

約数ペア:

[(1, 19996806005), (5, 3999361201), (11, 1817891455), (55, 363578291), (71, 281645155), (113, 176962885), (355, 56329031), (565, 35392577), (781, 25604105), (1243, 16087535), (3905, 5120821), (6215, 3217507), (8023, 2492435), (40115, 498487), (45317, 441265), (88253, 226585)]