19728279

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{14327}}^1$

素因数の和:14356

約数の個数: 20

約数和(自身を含む): 31206384

約数和(自身を除く): 11478105

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 14327, 42981, 128943, 243559, 386829, 730677, 1160487, 2192031, 6576093, 19728279]

約数ペア:

[(1, 19728279), (3, 6576093), (9, 2192031), (17, 1160487), (27, 730677), (51, 386829), (81, 243559), (153, 128943), (459, 42981), (1377, 14327)]