31801991

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{647}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 36288000

約数和(自身を除く): 4486009

約数列:

[1, 13, 19, 199, 247, 647, 2587, 3781, 8411, 12293, 49153, 128753, 159809, 1673789, 2446307, 31801991]

約数ペア:

[(1, 31801991), (13, 2446307), (19, 1673789), (199, 159809), (247, 128753), (647, 49153), (2587, 12293), (3781, 8411)]