21665488

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{104161}}^1$

素因数の和:104182

約数の個数: 20

約数和(自身を含む): 45206308

約数和(自身を除く): 23540820

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 104161, 208322, 416644, 833288, 1354093, 1666576, 2708186, 5416372, 10832744, 21665488]

約数ペア:

[(1, 21665488), (2, 10832744), (4, 5416372), (8, 2708186), (13, 1666576), (16, 1354093), (26, 833288), (52, 416644), (104, 208322), (208, 104161)]