21087621

素因数分解:

$3^4\times {\mathrm{257}}^1\times {\mathrm{1013}}^1$

素因数の和:1282

約数の個数: 20

約数和(自身を含む): 31655052

約数和(自身を除く): 10567431

約数列:

[1, 3, 9, 27, 81, 257, 771, 1013, 2313, 3039, 6939, 9117, 20817, 27351, 82053, 260341, 781023, 2343069, 7029207, 21087621]

約数ペア:

[(1, 21087621), (3, 7029207), (9, 2343069), (27, 781023), (81, 260341), (257, 82053), (771, 27351), (1013, 20817), (2313, 9117), (3039, 6939)]