21512169

素因数分解:

$3^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2647}}^1$

素因数の和:2706

約数の個数: 32

約数和(自身を含む): 37283840

約数和(自身を除く): 15771671

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 129, 189, 301, 387, 903, 1161, 2647, 2709, 7941, 8127, 18529, 23823, 55587, 71469, 113821, 166761, 341463, 500283, 796747, 1024389, 2390241, 3073167, 7170723, 21512169]

約数ペア:

[(1, 21512169), (3, 7170723), (7, 3073167), (9, 2390241), (21, 1024389), (27, 796747), (43, 500283), (63, 341463), (129, 166761), (189, 113821), (301, 71469), (387, 55587), (903, 23823), (1161, 18529), (2647, 8127), (2709, 7941)]