20132021

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1\times {\mathrm{1123}}^1$

素因数の和:1340

約数の個数: 16

約数和(自身を含む): 24925824

約数和(自身を除く): 4793803

約数列:

[1, 7, 13, 91, 197, 1123, 1379, 2561, 7861, 14599, 17927, 102193, 221231, 1548617, 2876003, 20132021]

約数ペア:

[(1, 20132021), (7, 2876003), (13, 1548617), (91, 221231), (197, 102193), (1123, 17927), (1379, 14599), (2561, 7861)]