21084543

素因数分解:

$3^4\times {\mathrm{149}}^1\times {\mathrm{1747}}^1$

素因数の和:1908

約数の個数: 20

約数和(自身を含む): 31726200

約数和(自身を除く): 10641657

約数列:

[1, 3, 9, 27, 81, 149, 447, 1341, 1747, 4023, 5241, 12069, 15723, 47169, 141507, 260303, 780909, 2342727, 7028181, 21084543]

約数ペア:

[(1, 21084543), (3, 7028181), (9, 2342727), (27, 780909), (81, 260303), (149, 141507), (447, 47169), (1341, 15723), (1747, 12069), (4023, 5241)]