18680949

素因数分解:

$3^4\times 7^1\times {\mathrm{47}}^1\times {\mathrm{701}}^1$

素因数の和:767

約数の個数: 40

約数和(自身を含む): 32617728

約数和(自身を除く): 13936779

約数列:

[1, 3, 7, 9, 21, 27, 47, 63, 81, 141, 189, 329, 423, 567, 701, 987, 1269, 2103, 2961, 3807, 4907, 6309, 8883, 14721, 18927, 26649, 32947, 44163, 56781, 98841, 132489, 230629, 296523, 397467, 691887, 889569, 2075661, 2668707, 6226983, 18680949]

約数ペア:

[(1, 18680949), (3, 6226983), (7, 2668707), (9, 2075661), (21, 889569), (27, 691887), (47, 397467), (63, 296523), (81, 230629), (141, 132489), (189, 98841), (329, 56781), (423, 44163), (567, 32947), (701, 26649), (987, 18927), (1269, 14721), (2103, 8883), (2961, 6309), (3807, 4907)]