21111959

素因数分解:

${\mathrm{11}}^2\times {\mathrm{149}}^1\times {\mathrm{1171}}^1$

素因数の和:1342

約数の個数: 12

約数和(自身を含む): 23381400

約数和(自身を除く): 2269441

約数列:

[1, 11, 121, 149, 1171, 1639, 12881, 18029, 141691, 174479, 1919269, 21111959]

約数ペア:

[(1, 21111959), (11, 1919269), (121, 174479), (149, 141691), (1171, 18029), (1639, 12881)]