18987453

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{13789}}^1$

素因数の和:13818

約数の個数: 20

約数和(自身を含む): 30034620

約数和(自身を除く): 11047167

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 13789, 41367, 124101, 234413, 372303, 703239, 1116909, 2109717, 6329151, 18987453]

約数ペア:

[(1, 18987453), (3, 6329151), (9, 2109717), (17, 1116909), (27, 703239), (51, 372303), (81, 234413), (153, 124101), (459, 41367), (1377, 13789)]