388889721

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{823}}^1$

素因数の和:923

約数の個数: 64

約数和(自身を含む): 661309440

約数和(自身を除く): 272419719

約数列:

[1, 3, 9, 11, 27, 33, 37, 43, 99, 111, 129, 297, 333, 387, 407, 473, 823, 999, 1161, 1221, 1419, 1591, 2469, 3663, 4257, 4773, 7407, 9053, 10989, 12771, 14319, 17501, 22221, 27159, 30451, 35389, 42957, 52503, 81477, 91353, 106167, 157509, 244431, 274059, 318501, 334961, 389279, 472527, 822177, 955503, 1004883, 1167837, 1309393, 3014649, 3503511, 3928179, 9043947, 10510533, 11784537, 14403323, 35353611, 43209969, 129629907, 388889721]

約数ペア:

[(1, 388889721), (3, 129629907), (9, 43209969), (11, 35353611), (27, 14403323), (33, 11784537), (37, 10510533), (43, 9043947), (99, 3928179), (111, 3503511), (129, 3014649), (297, 1309393), (333, 1167837), (387, 1004883), (407, 955503), (473, 822177), (823, 472527), (999, 389279), (1161, 334961), (1221, 318501), (1419, 274059), (1591, 244431), (2469, 157509), (3663, 106167), (4257, 91353), (4773, 81477), (7407, 52503), (9053, 42957), (10989, 35389), (12771, 30451), (14319, 27159), (17501, 22221)]