18518787

素因数分解:

$3^6\times 7^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1$

素因数の和:235

約数の個数: 56

約数和(自身を含む): 33576960

約数和(自身を除く): 15058173

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 191, 243, 399, 513, 567, 573, 729, 1197, 1337, 1539, 1701, 1719, 3591, 3629, 4011, 4617, 5103, 5157, 10773, 10887, 12033, 13851, 15471, 25403, 32319, 32661, 36099, 46413, 76209, 96957, 97983, 108297, 139239, 228627, 293949, 324891, 685881, 881847, 974673, 2057643, 2645541, 6172929, 18518787]

約数ペア:

[(1, 18518787), (3, 6172929), (7, 2645541), (9, 2057643), (19, 974673), (21, 881847), (27, 685881), (57, 324891), (63, 293949), (81, 228627), (133, 139239), (171, 108297), (189, 97983), (191, 96957), (243, 76209), (399, 46413), (513, 36099), (567, 32661), (573, 32319), (729, 25403), (1197, 15471), (1337, 13851), (1539, 12033), (1701, 10887), (1719, 10773), (3591, 5157), (3629, 5103), (4011, 4617)]