21805119

素因数分解:

$3^6\times 7^1\times {\mathrm{4273}}^1$

素因数の和:4298

約数の個数: 28

約数和(自身を含む): 37371856

約数和(自身を除く): 15566737

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4273, 5103, 12819, 29911, 38457, 89733, 115371, 269199, 346113, 807597, 1038339, 2422791, 3115017, 7268373, 21805119]

約数ペア:

[(1, 21805119), (3, 7268373), (7, 3115017), (9, 2422791), (21, 1038339), (27, 807597), (63, 346113), (81, 269199), (189, 115371), (243, 89733), (567, 38457), (729, 29911), (1701, 12819), (4273, 5103)]