19691721

素因数分解:

$3^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2423}}^1$

素因数の和:2482

約数の個数: 32

約数和(自身を含む): 34129920

約数和(自身を除く): 14438199

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 129, 189, 301, 387, 903, 1161, 2423, 2709, 7269, 8127, 16961, 21807, 50883, 65421, 104189, 152649, 312567, 457947, 729323, 937701, 2187969, 2813103, 6563907, 19691721]

約数ペア:

[(1, 19691721), (3, 6563907), (7, 2813103), (9, 2187969), (21, 937701), (27, 729323), (43, 457947), (63, 312567), (129, 152649), (189, 104189), (301, 65421), (387, 50883), (903, 21807), (1161, 16961), (2423, 8127), (2709, 7269)]