205821

素因数分解:

$3^5\times 7^1\times {\mathrm{11}}^2$

素因数の和:44

約数の個数: 36

約数和(自身を含む): 387296

約数和(自身を除く): 181475

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 121, 189, 231, 243, 297, 363, 567, 693, 847, 891, 1089, 1701, 2079, 2541, 2673, 3267, 6237, 7623, 9801, 18711, 22869, 29403, 68607, 205821]

約数ペア:

[(1, 205821), (3, 68607), (7, 29403), (9, 22869), (11, 18711), (21, 9801), (27, 7623), (33, 6237), (63, 3267), (77, 2673), (81, 2541), (99, 2079), (121, 1701), (189, 1089), (231, 891), (243, 847), (297, 693), (363, 567)]