21887811

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{101}}^1\times {\mathrm{199}}^1$

素因数の和:328

約数の個数: 36

約数和(自身を含む): 35271600

約数和(自身を除く): 13383789

約数列:

[1, 3, 9, 11, 33, 99, 101, 121, 199, 303, 363, 597, 909, 1089, 1111, 1791, 2189, 3333, 6567, 9999, 12221, 19701, 20099, 24079, 36663, 60297, 72237, 109989, 180891, 216711, 221089, 663267, 1989801, 2431979, 7295937, 21887811]

約数ペア:

[(1, 21887811), (3, 7295937), (9, 2431979), (11, 1989801), (33, 663267), (99, 221089), (101, 216711), (121, 180891), (199, 109989), (303, 72237), (363, 60297), (597, 36663), (909, 24079), (1089, 20099), (1111, 19701), (1791, 12221), (2189, 9999), (3333, 6567)]