19818351

素因数分解:

$3^5\times 7^1\times {\mathrm{61}}^1\times {\mathrm{191}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 34664448

約数和(自身を除く): 14846097

約数列:

[1, 3, 7, 9, 21, 27, 61, 63, 81, 183, 189, 191, 243, 427, 549, 567, 573, 1281, 1337, 1647, 1701, 1719, 3843, 4011, 4941, 5157, 11529, 11651, 12033, 14823, 15471, 34587, 34953, 36099, 46413, 81557, 103761, 104859, 108297, 244671, 314577, 324891, 734013, 943731, 2202039, 2831193, 6606117, 19818351]

約数ペア:

[(1, 19818351), (3, 6606117), (7, 2831193), (9, 2202039), (21, 943731), (27, 734013), (61, 324891), (63, 314577), (81, 244671), (183, 108297), (189, 104859), (191, 103761), (243, 81557), (427, 46413), (549, 36099), (567, 34953), (573, 34587), (1281, 15471), (1337, 14823), (1647, 12033), (1701, 11651), (1719, 11529), (3843, 5157), (4011, 4941)]