19400031

素因数分解:

$3^2\times 7^2\times {\mathrm{43991}}^1$

素因数の和:44011

約数の個数: 18

約数和(自身を含む): 32598072

約数和(自身を除く): 13198041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 43991, 131973, 307937, 395919, 923811, 2155559, 2771433, 6466677, 19400031]

約数ペア:

[(1, 19400031), (3, 6466677), (7, 2771433), (9, 2155559), (21, 923811), (49, 395919), (63, 307937), (147, 131973), (441, 43991)]