21399279

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{389}}^1\times {\mathrm{1667}}^1$

素因数の和:2070

約数の個数: 16

約数和(自身を含む): 31224960

約数和(自身を除く): 9825681

約数列:

[1, 3, 11, 33, 389, 1167, 1667, 4279, 5001, 12837, 18337, 55011, 648463, 1945389, 7133093, 21399279]

約数ペア:

[(1, 21399279), (3, 7133093), (11, 1945389), (33, 648463), (389, 55011), (1167, 18337), (1667, 12837), (4279, 5001)]