21493791

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{1091}}^1$

素因数の和:1307

約数の個数: 24

約数和(自身を含む): 34070400

約数和(自身を除く): 12576609

約数列:

[1, 3, 9, 11, 33, 99, 199, 597, 1091, 1791, 2189, 3273, 6567, 9819, 12001, 19701, 36003, 108009, 217109, 651327, 1953981, 2388199, 7164597, 21493791]

約数ペア:

[(1, 21493791), (3, 7164597), (9, 2388199), (11, 1953981), (33, 651327), (99, 217109), (199, 108009), (597, 36003), (1091, 19701), (1791, 12001), (2189, 9819), (3273, 6567)]