7975989

素因数分解:

$3^7\times 7^1\times {\mathrm{521}}^1$

素因数の和:549

約数の個数: 32

約数和(自身を含む): 13697280

約数和(自身を除く): 5721291

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 521, 567, 729, 1563, 1701, 2187, 3647, 4689, 5103, 10941, 14067, 15309, 32823, 42201, 98469, 126603, 295407, 379809, 886221, 1139427, 2658663, 7975989]

約数ペア:

[(1, 7975989), (3, 2658663), (7, 1139427), (9, 886221), (21, 379809), (27, 295407), (63, 126603), (81, 98469), (189, 42201), (243, 32823), (521, 15309), (567, 14067), (729, 10941), (1563, 5103), (1701, 4689), (2187, 3647)]