19788041

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{389}}^1$

素因数の和:465

約数の個数: 24

約数和(自身を含む): 25122240

約数和(自身を除く): 5334199

約数列:

[1, 7, 13, 43, 91, 169, 301, 389, 559, 1183, 2723, 3913, 5057, 7267, 16727, 35399, 50869, 65741, 117089, 217451, 460187, 1522157, 2826863, 19788041]

約数ペア:

[(1, 19788041), (7, 2826863), (13, 1522157), (43, 460187), (91, 217451), (169, 117089), (301, 65741), (389, 50869), (559, 35399), (1183, 16727), (2723, 7267), (3913, 5057)]