20398521

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2797}}^1$

素因数の和:2841

約数の個数: 32

約数和(自身を含む): 33844608

約数和(自身を除く): 13446087

約数列:

[1, 3, 11, 13, 17, 33, 39, 51, 143, 187, 221, 429, 561, 663, 2431, 2797, 7293, 8391, 30767, 36361, 47549, 92301, 109083, 142647, 399971, 523039, 618137, 1199913, 1569117, 1854411, 6799507, 20398521]

約数ペア:

[(1, 20398521), (3, 6799507), (11, 1854411), (13, 1569117), (17, 1199913), (33, 618137), (39, 523039), (51, 399971), (143, 142647), (187, 109083), (221, 92301), (429, 47549), (561, 36361), (663, 30767), (2431, 8391), (2797, 7293)]