21947247

素因数分解:

$3^3\times 7^2\times {\mathrm{53}}^1\times {\mathrm{313}}^1$

素因数の和:389

約数の個数: 48

約数和(自身を含む): 38659680

約数和(自身を除く): 16712433

約数列:

[1, 3, 7, 9, 21, 27, 49, 53, 63, 147, 159, 189, 313, 371, 441, 477, 939, 1113, 1323, 1431, 2191, 2597, 2817, 3339, 6573, 7791, 8451, 10017, 15337, 16589, 19719, 23373, 46011, 49767, 59157, 70119, 116123, 138033, 149301, 348369, 414099, 447903, 812861, 1045107, 2438583, 3135321, 7315749, 21947247]

約数ペア:

[(1, 21947247), (3, 7315749), (7, 3135321), (9, 2438583), (21, 1045107), (27, 812861), (49, 447903), (53, 414099), (63, 348369), (147, 149301), (159, 138033), (189, 116123), (313, 70119), (371, 59157), (441, 49767), (477, 46011), (939, 23373), (1113, 19719), (1323, 16589), (1431, 15337), (2191, 10017), (2597, 8451), (2817, 7791), (3339, 6573)]