20391161

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{1103}}^1$

素因数の和:1268

約数の個数: 16

約数和(自身を含む): 24729600

約数和(自身を除く): 4338439

約数列:

[1, 7, 19, 133, 139, 973, 1103, 2641, 7721, 18487, 20957, 146699, 153317, 1073219, 2913023, 20391161]

約数ペア:

[(1, 20391161), (7, 2913023), (19, 1073219), (133, 153317), (139, 146699), (973, 20957), (1103, 18487), (2641, 7721)]