20154123

素因数分解:

$3^3\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{199}}^1$

素因数の和:261

約数の個数: 48

約数和(自身を含む): 34048000

約数和(自身を除く): 13893877

約数列:

[1, 3, 9, 11, 27, 31, 33, 93, 99, 121, 199, 279, 297, 341, 363, 597, 837, 1023, 1089, 1791, 2189, 3069, 3267, 3751, 5373, 6169, 6567, 9207, 11253, 18507, 19701, 24079, 33759, 55521, 59103, 67859, 72237, 101277, 166563, 203577, 216711, 610731, 650133, 746449, 1832193, 2239347, 6718041, 20154123]

約数ペア:

[(1, 20154123), (3, 6718041), (9, 2239347), (11, 1832193), (27, 746449), (31, 650133), (33, 610731), (93, 216711), (99, 203577), (121, 166563), (199, 101277), (279, 72237), (297, 67859), (341, 59103), (363, 55521), (597, 33759), (837, 24079), (1023, 19701), (1089, 18507), (1791, 11253), (2189, 9207), (3069, 6567), (3267, 6169), (3751, 5373)]