21455199

素因数分解:

$3^6\times {\mathrm{19}}^1\times {\mathrm{1549}}^1$

素因数の和:1586

約数の個数: 28

約数和(自身を含む): 33883000

約数和(自身を除く): 12427801

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 243, 513, 729, 1539, 1549, 4617, 4647, 13851, 13941, 29431, 41823, 88293, 125469, 264879, 376407, 794637, 1129221, 2383911, 7151733, 21455199]

約数ペア:

[(1, 21455199), (3, 7151733), (9, 2383911), (19, 1129221), (27, 794637), (57, 376407), (81, 264879), (171, 125469), (243, 88293), (513, 41823), (729, 29431), (1539, 13941), (1549, 13851), (4617, 4647)]