21640419

素因数分解:

$3^3\times {\mathrm{127}}^1\times {\mathrm{6311}}^1$

素因数の和:6447

約数の個数: 16

約数和(自身を含む): 32317440

約数和(自身を除く): 10677021

約数列:

[1, 3, 9, 27, 127, 381, 1143, 3429, 6311, 18933, 56799, 170397, 801497, 2404491, 7213473, 21640419]

約数ペア:

[(1, 21640419), (3, 7213473), (9, 2404491), (27, 801497), (127, 170397), (381, 56799), (1143, 18933), (3429, 6311)]