18881343

素因数分解:

$3^5\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1$

素因数の和:210

約数の個数: 48

約数和(自身を含む): 31391360

約数和(自身を除く): 12510017

約数列:

[1, 3, 9, 13, 27, 39, 43, 81, 117, 129, 139, 243, 351, 387, 417, 559, 1053, 1161, 1251, 1677, 1807, 3159, 3483, 3753, 5031, 5421, 5977, 10449, 11259, 15093, 16263, 17931, 33777, 45279, 48789, 53793, 77701, 135837, 146367, 161379, 233103, 439101, 484137, 699309, 1452411, 2097927, 6293781, 18881343]

約数ペア:

[(1, 18881343), (3, 6293781), (9, 2097927), (13, 1452411), (27, 699309), (39, 484137), (43, 439101), (81, 233103), (117, 161379), (129, 146367), (139, 135837), (243, 77701), (351, 53793), (387, 48789), (417, 45279), (559, 33777), (1053, 17931), (1161, 16263), (1251, 15093), (1677, 11259), (1807, 10449), (3159, 5977), (3483, 5421), (3753, 5031)]