21065356

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{9421}}^1$

素因数の和:9481

約数の個数: 24

約数和(自身を含む): 40627664

約数和(自身を除く): 19562308

約数列:

[1, 2, 4, 13, 26, 43, 52, 86, 172, 559, 1118, 2236, 9421, 18842, 37684, 122473, 244946, 405103, 489892, 810206, 1620412, 5266339, 10532678, 21065356]

約数ペア:

[(1, 21065356), (2, 10532678), (4, 5266339), (13, 1620412), (26, 810206), (43, 489892), (52, 405103), (86, 244946), (172, 122473), (559, 37684), (1118, 18842), (2236, 9421)]