20881029

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{7541}}^1$

素因数の和:7628

約数の個数: 16

約数和(自身を含む): 30409344

約数和(自身を除く): 9528315

約数列:

[1, 3, 13, 39, 71, 213, 923, 2769, 7541, 22623, 98033, 294099, 535411, 1606233, 6960343, 20881029]

約数ペア:

[(1, 20881029), (3, 6960343), (13, 1606233), (39, 535411), (71, 294099), (213, 98033), (923, 22623), (2769, 7541)]