19996636

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{641}}^1\times {\mathrm{709}}^1$

素因数の和:1365

約数の個数: 24

約数和(自身を含む): 38288880

約数和(自身を除く): 18292244

約数列:

[1, 2, 4, 11, 22, 44, 641, 709, 1282, 1418, 2564, 2836, 7051, 7799, 14102, 15598, 28204, 31196, 454469, 908938, 1817876, 4999159, 9998318, 19996636]

約数ペア:

[(1, 19996636), (2, 9998318), (4, 4999159), (11, 1817876), (22, 908938), (44, 454469), (641, 31196), (709, 28204), (1282, 15598), (1418, 14102), (2564, 7799), (2836, 7051)]