20103489

素因数分解:

$3^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:278

約数の個数: 48

約数和(自身を含む): 34978944

約数和(自身を除く): 14875455

約数列:

[1, 3, 7, 9, 21, 41, 43, 63, 123, 129, 181, 287, 301, 369, 387, 543, 861, 903, 1267, 1629, 1763, 2583, 2709, 3801, 5289, 7421, 7783, 11403, 12341, 15867, 22263, 23349, 37023, 51947, 54481, 66789, 70047, 111069, 155841, 163443, 319103, 467523, 490329, 957309, 2233721, 2871927, 6701163, 20103489]

約数ペア:

[(1, 20103489), (3, 6701163), (7, 2871927), (9, 2233721), (21, 957309), (41, 490329), (43, 467523), (63, 319103), (123, 163443), (129, 155841), (181, 111069), (287, 70047), (301, 66789), (369, 54481), (387, 51947), (543, 37023), (861, 23349), (903, 22263), (1267, 15867), (1629, 12341), (1763, 11403), (2583, 7783), (2709, 7421), (3801, 5289)]