19911609

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{17987}}^1$

素因数の和:18037

約数の個数: 16

約数和(自身を含む): 30219840

約数和(自身を除く): 10308231

約数列:

[1, 3, 9, 27, 41, 123, 369, 1107, 17987, 53961, 161883, 485649, 737467, 2212401, 6637203, 19911609]

約数ペア:

[(1, 19911609), (3, 6637203), (9, 2212401), (27, 737467), (41, 485649), (123, 161883), (369, 53961), (1107, 17987)]