208904905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{199909}}^1$

素因数の和:199944

約数の個数: 16

約数和(自身を含む): 287870400

約数和(自身を除く): 78965495

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 199909, 999545, 2198999, 3798271, 10994995, 18991355, 41780981, 208904905]

約数ペア:

[(1, 208904905), (5, 41780981), (11, 18991355), (19, 10994995), (55, 3798271), (95, 2198999), (209, 999545), (1045, 199909)]