81670771

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:212

約数の個数: 48

約数和(自身を含む): 111310848

約数和(自身を除く): 29640077

約数列:

[1, 7, 13, 17, 31, 91, 119, 131, 169, 217, 221, 403, 527, 917, 1183, 1547, 1703, 2227, 2821, 2873, 3689, 4061, 5239, 6851, 11921, 15589, 20111, 22139, 28427, 28951, 36673, 47957, 52793, 69037, 89063, 154973, 202657, 369551, 376363, 483259, 623441, 686309, 897481, 2634541, 4804163, 6282367, 11667253, 81670771]

約数ペア:

[(1, 81670771), (7, 11667253), (13, 6282367), (17, 4804163), (31, 2634541), (91, 897481), (119, 686309), (131, 623441), (169, 483259), (217, 376363), (221, 369551), (403, 202657), (527, 154973), (917, 89063), (1183, 69037), (1547, 52793), (1703, 47957), (2227, 36673), (2821, 28951), (2873, 28427), (3689, 22139), (4061, 20111), (5239, 15589), (6851, 11921)]