209504449

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{388691}}^1$

素因数の和:388716

約数の個数: 12

約数和(自身を含む): 265865328

約数和(自身を除く): 56360879

約数列:

[1, 7, 11, 49, 77, 539, 388691, 2720837, 4275601, 19045859, 29929207, 209504449]

約数ペア:

[(1, 209504449), (7, 29929207), (11, 19045859), (49, 4275601), (77, 2720837), (539, 388691)]