19980466

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{21121}}^1$

素因数の和:21177

約数の個数: 16

約数和(自身を含む): 33457248

約数和(自身を除く): 13476782

約数列:

[1, 2, 11, 22, 43, 86, 473, 946, 21121, 42242, 232331, 464662, 908203, 1816406, 9990233, 19980466]

約数ペア:

[(1, 19980466), (2, 9990233), (11, 1816406), (22, 908203), (43, 464662), (86, 232331), (473, 42242), (946, 21121)]