20784412

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{42943}}^1$

素因数の和:42969

約数の個数: 18

約数和(自身を含む): 39980864

約数和(自身を除く): 19196452

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 42943, 85886, 171772, 472373, 944746, 1889492, 5196103, 10392206, 20784412]

約数ペア:

[(1, 20784412), (2, 10392206), (4, 5196103), (11, 1889492), (22, 944746), (44, 472373), (121, 171772), (242, 85886), (484, 42943)]