21258556

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{397}}^1\times {\mathrm{1217}}^1$

素因数の和:1629

約数の個数: 24

約数和(自身を含む): 40720176

約数和(自身を除く): 19461620

約数列:

[1, 2, 4, 11, 22, 44, 397, 794, 1217, 1588, 2434, 4367, 4868, 8734, 13387, 17468, 26774, 53548, 483149, 966298, 1932596, 5314639, 10629278, 21258556]

約数ペア:

[(1, 21258556), (2, 10629278), (4, 5314639), (11, 1932596), (22, 966298), (44, 483149), (397, 53548), (794, 26774), (1217, 17468), (1588, 13387), (2434, 8734), (4367, 4868)]