217973511

素因数分解:

$3^4\times 7^2\times {\mathrm{54919}}^1$

素因数の和:54945

約数の個数: 30

約数和(自身を含む): 378783240

約数和(自身を除く): 160809729

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 54919, 164757, 384433, 494271, 1153299, 1482813, 2691031, 3459897, 4448439, 8073093, 10379691, 24219279, 31139073, 72657837, 217973511]

約数ペア:

[(1, 217973511), (3, 72657837), (7, 31139073), (9, 24219279), (21, 10379691), (27, 8073093), (49, 4448439), (63, 3459897), (81, 2691031), (147, 1482813), (189, 1153299), (441, 494271), (567, 384433), (1323, 164757), (3969, 54919)]