21420189

素因数分解:

$3^2\times 7^1\times {\mathrm{103}}^1\times {\mathrm{3301}}^1$

素因数の和:3417

約数の個数: 24

約数和(自身を含む): 35714432

約数和(自身を除く): 14294243

約数列:

[1, 3, 7, 9, 21, 63, 103, 309, 721, 927, 2163, 3301, 6489, 9903, 23107, 29709, 69321, 207963, 340003, 1020009, 2380021, 3060027, 7140063, 21420189]

約数ペア:

[(1, 21420189), (3, 7140063), (7, 3060027), (9, 2380021), (21, 1020009), (63, 340003), (103, 207963), (309, 69321), (721, 29709), (927, 23107), (2163, 9903), (3301, 6489)]