209120821

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1531}}^1$

素因数の和:1649

約数の個数: 32

約数和(自身を含む): 274534400

約数和(自身を除く): 65413579

約数列:

[1, 7, 13, 19, 79, 91, 133, 247, 553, 1027, 1501, 1531, 1729, 7189, 10507, 10717, 19513, 19903, 29089, 120949, 136591, 139321, 203623, 378157, 846643, 1572337, 2298031, 2647099, 11006359, 16086217, 29874403, 209120821]

約数ペア:

[(1, 209120821), (7, 29874403), (13, 16086217), (19, 11006359), (79, 2647099), (91, 2298031), (133, 1572337), (247, 846643), (553, 378157), (1027, 203623), (1501, 139321), (1531, 136591), (1729, 120949), (7189, 29089), (10507, 19903), (10717, 19513)]