20519919

素因数分解:

$3^3\times 7^1\times {\mathrm{108571}}^1$

素因数の和:108587

約数の個数: 16

約数和(自身を含む): 34743040

約数和(自身を除く): 14223121

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 108571, 325713, 759997, 977139, 2279991, 2931417, 6839973, 20519919]

約数ペア:

[(1, 20519919), (3, 6839973), (7, 2931417), (9, 2279991), (21, 977139), (27, 759997), (63, 325713), (189, 108571)]