20421181

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{491}}^1$

素因数の和:720

約数の個数: 16

約数和(自身を含む): 23616000

約数和(自身を除く): 3194819

約数列:

[1, 11, 19, 199, 209, 491, 2189, 3781, 5401, 9329, 41591, 97709, 102619, 1074799, 1856471, 20421181]

約数ペア:

[(1, 20421181), (11, 1856471), (19, 1074799), (199, 102619), (209, 97709), (491, 41591), (2189, 9329), (3781, 5401)]