18876321

素因数分解:

$3^4\times {\mathrm{53}}^1\times {\mathrm{4397}}^1$

素因数の和:4462

約数の個数: 20

約数和(自身を含む): 28736532

約数和(自身を除く): 9860211

約数列:

[1, 3, 9, 27, 53, 81, 159, 477, 1431, 4293, 4397, 13191, 39573, 118719, 233041, 356157, 699123, 2097369, 6292107, 18876321]

約数ペア:

[(1, 18876321), (3, 6292107), (9, 2097369), (27, 699123), (53, 356157), (81, 233041), (159, 118719), (477, 39573), (1431, 13191), (4293, 4397)]