21105119

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{151}}^1\times {\mathrm{487}}^1$

素因数の和:686

約数の個数: 16

約数和(自身を含む): 24923136

約数和(自身を除く): 3818017

約数列:

[1, 7, 41, 151, 287, 487, 1057, 3409, 6191, 19967, 43337, 73537, 139769, 514759, 3015017, 21105119]

約数ペア:

[(1, 21105119), (7, 3015017), (41, 514759), (151, 139769), (287, 73537), (487, 43337), (1057, 19967), (3409, 6191)]