2821959

素因数分解:

$3^6\times 7^2\times {\mathrm{79}}^1$

素因数の和:111

約数の個数: 42

約数和(自身を含む): 4984080

約数和(自身を除く): 2162121

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 79, 81, 147, 189, 237, 243, 441, 553, 567, 711, 729, 1323, 1659, 1701, 2133, 3871, 3969, 4977, 5103, 6399, 11613, 11907, 14931, 19197, 34839, 35721, 44793, 57591, 104517, 134379, 313551, 403137, 940653, 2821959]

約数ペア:

[(1, 2821959), (3, 940653), (7, 403137), (9, 313551), (21, 134379), (27, 104517), (49, 57591), (63, 44793), (79, 35721), (81, 34839), (147, 19197), (189, 14931), (237, 11907), (243, 11613), (441, 6399), (553, 5103), (567, 4977), (711, 3969), (729, 3871), (1323, 2133), (1659, 1701)]