21169287

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2879}}^1$

素因数の和:2947

約数の個数: 24

約数和(自身を含む): 32947200

約数和(自身を除く): 11777913

約数列:

[1, 3, 9, 19, 43, 57, 129, 171, 387, 817, 2451, 2879, 7353, 8637, 25911, 54701, 123797, 164103, 371391, 492309, 1114173, 2352143, 7056429, 21169287]

約数ペア:

[(1, 21169287), (3, 7056429), (9, 2352143), (19, 1114173), (43, 492309), (57, 371391), (129, 164103), (171, 123797), (387, 54701), (817, 25911), (2451, 8637), (2879, 7353)]