21999989

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{1657}}^1$

素因数の和:1756

約数の個数: 16

約数和(自身を含む): 25785216

約数和(自身を除く): 3785227

約数列:

[1, 11, 17, 71, 187, 781, 1207, 1657, 13277, 18227, 28169, 117647, 309859, 1294117, 1999999, 21999989]

約数ペア:

[(1, 21999989), (11, 1999999), (17, 1294117), (71, 309859), (187, 117647), (781, 28169), (1207, 18227), (1657, 13277)]