21086440921

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{389}}^1\times {\mathrm{1979}}^1$

素因数の和:2438

約数の個数: 48

約数和(自身を含む): 27113486400

約数和(自身を除く): 6027045479

約数列:

[1, 7, 13, 43, 49, 91, 301, 389, 559, 637, 1979, 2107, 2723, 3913, 5057, 13853, 16727, 19061, 25727, 27391, 35399, 85097, 96971, 117089, 180089, 217451, 247793, 595679, 769831, 819623, 1106261, 1260623, 1522157, 4169753, 5388817, 7743827, 10007803, 10655099, 33102733, 37721719, 54206789, 70054621, 231719131, 430335529, 490382347, 1622033917, 3012348703, 21086440921]

約数ペア:

[(1, 21086440921), (7, 3012348703), (13, 1622033917), (43, 490382347), (49, 430335529), (91, 231719131), (301, 70054621), (389, 54206789), (559, 37721719), (637, 33102733), (1979, 10655099), (2107, 10007803), (2723, 7743827), (3913, 5388817), (5057, 4169753), (13853, 1522157), (16727, 1260623), (19061, 1106261), (25727, 819623), (27391, 769831), (35399, 595679), (85097, 247793), (96971, 217451), (117089, 180089)]