19712891

素因数分解:

${\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{9901}}^1$

素因数の和:10093

約数の個数: 8

約数和(自身を含む): 21625968

約数和(自身を除く): 1913077

約数列:

[1, 11, 181, 1991, 9901, 108911, 1792081, 19712891]

約数ペア:

[(1, 19712891), (11, 1792081), (181, 108911), (1991, 9901)]