721401471

素因数分解:

$3^4\times 7^2\times {\mathrm{181759}}^1$

素因数の和:181785

約数の個数: 30

約数和(自身を含む): 1253598720

約数和(自身を除く): 532197249

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 181759, 545277, 1272313, 1635831, 3816939, 4907493, 8906191, 11450817, 14722479, 26718573, 34352451, 80155719, 103057353, 240467157, 721401471]

約数ペア:

[(1, 721401471), (3, 240467157), (7, 103057353), (9, 80155719), (21, 34352451), (27, 26718573), (49, 14722479), (63, 11450817), (81, 8906191), (147, 4907493), (189, 3816939), (441, 1635831), (567, 1272313), (1323, 545277), (3969, 181759)]