19905183

素因数分解:

$3^4\times {\mathrm{397}}^1\times {\mathrm{619}}^1$

素因数の和:1028

約数の個数: 20

約数和(自身を含む): 29857960

約数和(自身を除く): 9952777

約数列:

[1, 3, 9, 27, 81, 397, 619, 1191, 1857, 3573, 5571, 10719, 16713, 32157, 50139, 245743, 737229, 2211687, 6635061, 19905183]

約数ペア:

[(1, 19905183), (3, 6635061), (9, 2211687), (27, 737229), (81, 245743), (397, 50139), (619, 32157), (1191, 16713), (1857, 10719), (3573, 5571)]