209905619

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{1871}}^1$

素因数の和:1967

約数の個数: 32

約数和(自身を含む): 276037632

約数和(自身を除く): 66132013

約数列:

[1, 7, 11, 31, 47, 77, 217, 329, 341, 517, 1457, 1871, 2387, 3619, 10199, 13097, 16027, 20581, 58001, 87937, 112189, 144067, 406007, 615559, 638011, 967307, 2726047, 4466077, 6771149, 19082329, 29986517, 209905619]

約数ペア:

[(1, 209905619), (7, 29986517), (11, 19082329), (31, 6771149), (47, 4466077), (77, 2726047), (217, 967307), (329, 638011), (341, 615559), (517, 406007), (1457, 144067), (1871, 112189), (2387, 87937), (3619, 58001), (10199, 20581), (13097, 16027)]