21681679

素因数分解:

${\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1\times {\mathrm{281}}^1$

素因数の和:462

約数の個数: 16

約数和(自身を含む): 23823360

約数和(自身を除く): 2141681

約数列:

[1, 19, 31, 131, 281, 589, 2489, 4061, 5339, 8711, 36811, 77159, 165509, 699409, 1141141, 21681679]

約数ペア:

[(1, 21681679), (19, 1141141), (31, 699409), (131, 165509), (281, 77159), (589, 36811), (2489, 8711), (4061, 5339)]