20989991

素因数分解:

${\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{4231}}^1$

素因数の和:4294

約数の個数: 12

約数和(自身を含む): 23639952

約数和(自身を除く): 2649961

約数列:

[1, 11, 41, 121, 451, 4231, 4961, 46541, 173471, 511951, 1908181, 20989991]

約数ペア:

[(1, 20989991), (11, 1908181), (41, 511951), (121, 173471), (451, 46541), (4231, 4961)]