28772821

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{277}}^1$

素因数の和:385

約数の個数: 32

約数和(自身を含む): 38430720

約数和(自身を除く): 9657899

約数列:

[1, 7, 11, 19, 71, 77, 133, 209, 277, 497, 781, 1349, 1463, 1939, 3047, 5263, 5467, 9443, 14839, 19667, 21329, 36841, 57893, 103873, 137669, 216337, 373673, 405251, 1514359, 2615711, 4110403, 28772821]

約数ペア:

[(1, 28772821), (7, 4110403), (11, 2615711), (19, 1514359), (71, 405251), (77, 373673), (133, 216337), (209, 137669), (277, 103873), (497, 57893), (781, 36841), (1349, 21329), (1463, 19667), (1939, 14839), (3047, 9443), (5263, 5467)]