21565197

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15661}}^1$

素因数の和:15690

約数の個数: 20

約数和(自身を含む): 34111836

約数和(自身を除く): 12546639

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15661, 46983, 140949, 266237, 422847, 798711, 1268541, 2396133, 7188399, 21565197]

約数ペア:

[(1, 21565197), (3, 7188399), (9, 2396133), (17, 1268541), (27, 798711), (51, 422847), (81, 266237), (153, 140949), (459, 46983), (1377, 15661)]