21105009

素因数分解:

$3^3\times {\mathrm{103}}^1\times {\mathrm{7589}}^1$

素因数の和:7701

約数の個数: 16

約数和(自身を含む): 31574400

約数和(自身を除く): 10469391

約数列:

[1, 3, 9, 27, 103, 309, 927, 2781, 7589, 22767, 68301, 204903, 781667, 2345001, 7035003, 21105009]

約数ペア:

[(1, 21105009), (3, 7035003), (9, 2345001), (27, 781667), (103, 204903), (309, 68301), (927, 22767), (2781, 7589)]