20625921

素因数分解:

$3^4\times {\mathrm{149}}^1\times {\mathrm{1709}}^1$

素因数の和:1870

約数の個数: 20

約数和(自身を含む): 31036500

約数和(自身を除く): 10410579

約数列:

[1, 3, 9, 27, 81, 149, 447, 1341, 1709, 4023, 5127, 12069, 15381, 46143, 138429, 254641, 763923, 2291769, 6875307, 20625921]

約数ペア:

[(1, 20625921), (3, 6875307), (9, 2291769), (27, 763923), (81, 254641), (149, 138429), (447, 46143), (1341, 15381), (1709, 12069), (4023, 5127)]