20691209

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{14143}}^1$

素因数の和:14180

約数の個数: 16

約数和(自身を含む): 27156480

約数和(自身を除く): 6465271

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 14143, 99001, 155573, 268717, 1089011, 1881019, 2955887, 20691209]

約数ペア:

[(1, 20691209), (7, 2955887), (11, 1881019), (19, 1089011), (77, 268717), (133, 155573), (209, 99001), (1463, 14143)]