20988209

素因数分解:

${\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{1009}}^1$

素因数の和:1112

約数の個数: 16

約数和(自身を含む): 24046080

約数和(自身を除く): 3057871

約数列:

[1, 11, 31, 61, 341, 671, 1009, 1891, 11099, 20801, 31279, 61549, 344069, 677039, 1908019, 20988209]

約数ペア:

[(1, 20988209), (11, 1908019), (31, 677039), (61, 344069), (341, 61549), (671, 31279), (1009, 20801), (1891, 11099)]