20810881

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3221}}^1$

素因数の和:3312

約数の個数: 16

約数和(自身を含む): 25982208

約数和(自身を除く): 5171327

約数列:

[1, 7, 13, 71, 91, 497, 923, 3221, 6461, 22547, 41873, 228691, 293111, 1600837, 2972983, 20810881]

約数ペア:

[(1, 20810881), (7, 2972983), (13, 1600837), (71, 293111), (91, 228691), (497, 41873), (923, 22547), (3221, 6461)]