1678887

素因数分解:

$3^6\times 7^2\times {\mathrm{47}}^1$

素因数の和:79

約数の個数: 42

約数和(自身を含む): 2990448

約数和(自身を除く): 1311561

約数列:

[1, 3, 7, 9, 21, 27, 47, 49, 63, 81, 141, 147, 189, 243, 329, 423, 441, 567, 729, 987, 1269, 1323, 1701, 2303, 2961, 3807, 3969, 5103, 6909, 8883, 11421, 11907, 20727, 26649, 34263, 35721, 62181, 79947, 186543, 239841, 559629, 1678887]

約数ペア:

[(1, 1678887), (3, 559629), (7, 239841), (9, 186543), (21, 79947), (27, 62181), (47, 35721), (49, 34263), (63, 26649), (81, 20727), (141, 11907), (147, 11421), (189, 8883), (243, 6909), (329, 5103), (423, 3969), (441, 3807), (567, 2961), (729, 2303), (987, 1701), (1269, 1323)]