21807877

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{12613}}^1$

素因数の和:12652

約数の個数: 16

約数和(自身を含む): 28255360

約数和(自身を除く): 6447483

約数列:

[1, 7, 13, 19, 91, 133, 247, 1729, 12613, 88291, 163969, 239647, 1147783, 1677529, 3115411, 21807877]

約数ペア:

[(1, 21807877), (7, 3115411), (13, 1677529), (19, 1147783), (91, 239647), (133, 163969), (247, 88291), (1729, 12613)]