19908889

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19889}}^1$

素因数の和:19920

約数の個数: 16

約数和(自身を含む): 26732160

約数和(自身を除く): 6823271

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 19889, 139223, 218779, 258557, 1531453, 1809899, 2844127, 19908889]

約数ペア:

[(1, 19908889), (7, 2844127), (11, 1809899), (13, 1531453), (77, 258557), (91, 218779), (143, 139223), (1001, 19889)]