19810251

素因数分解:

$3^4\times {\mathrm{199}}^1\times {\mathrm{1229}}^1$

素因数の和:1440

約数の個数: 20

約数和(自身を含む): 29766000

約数和(自身を除く): 9955749

約数列:

[1, 3, 9, 27, 81, 199, 597, 1229, 1791, 3687, 5373, 11061, 16119, 33183, 99549, 244571, 733713, 2201139, 6603417, 19810251]

約数ペア:

[(1, 19810251), (3, 6603417), (9, 2201139), (27, 733713), (81, 244571), (199, 99549), (597, 33183), (1229, 16119), (1791, 11061), (3687, 5373)]