28178157

素因数分解:

$3^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{21997}}^1$

素因数の和:22068

約数の個数: 16

約数和(自身を含む): 43644032

約数和(自身を除く): 15465875

約数列:

[1, 3, 7, 21, 61, 183, 427, 1281, 21997, 65991, 153979, 461937, 1341817, 4025451, 9392719, 28178157]

約数ペア:

[(1, 28178157), (3, 9392719), (7, 4025451), (21, 1341817), (61, 461937), (183, 153979), (427, 65991), (1281, 21997)]