21081907

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{39113}}^1$

素因数の和:39138

約数の個数: 12

約数和(自身を含む): 26753976

約数和(自身を除く): 5672069

約数列:

[1, 7, 11, 49, 77, 539, 39113, 273791, 430243, 1916537, 3011701, 21081907]

約数ペア:

[(1, 21081907), (7, 3011701), (11, 1916537), (49, 430243), (77, 273791), (539, 39113)]