20513709

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{17669}}^1$

素因数の和:17721

約数の個数: 16

約数和(自身を含む): 31099200

約数和(自身を除く): 10585491

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 17669, 53007, 159021, 477063, 759767, 2279301, 6837903, 20513709]

約数ペア:

[(1, 20513709), (3, 6837903), (9, 2279301), (27, 759767), (43, 477063), (129, 159021), (387, 53007), (1161, 17669)]