20864389

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{13487}}^1$

素因数の和:13524

約数の個数: 16

約数和(自身を含む): 27191808

約数和(自身を除く): 6327419

約数列:

[1, 7, 13, 17, 91, 119, 221, 1547, 13487, 94409, 175331, 229279, 1227317, 1604953, 2980627, 20864389]

約数ペア:

[(1, 20864389), (7, 2980627), (13, 1604953), (17, 1227317), (91, 229279), (119, 175331), (221, 94409), (1547, 13487)]