20919019

素因数分解:

${\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{991}}^1$

素因数の和:1122

約数の個数: 16

約数和(自身を含む): 24284160

約数和(自身を除く): 3365141

約数列:

[1, 11, 19, 101, 209, 991, 1111, 1919, 10901, 18829, 21109, 100091, 207119, 1101001, 1901729, 20919019]

約数ペア:

[(1, 20919019), (11, 1901729), (19, 1101001), (101, 207119), (209, 100091), (991, 21109), (1111, 18829), (1919, 10901)]