87821998

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{211}}^1\times {\mathrm{18919}}^1$

素因数の和:19143

約数の個数: 16

約数和(自身を含む): 144397440

約数和(自身を除く): 56575442

約数列:

[1, 2, 11, 22, 211, 422, 2321, 4642, 18919, 37838, 208109, 416218, 3991909, 7983818, 43910999, 87821998]

約数ペア:

[(1, 87821998), (2, 43910999), (11, 7983818), (22, 3991909), (211, 416218), (422, 208109), (2321, 37838), (4642, 18919)]