21109491

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20047}}^1$

素因数の和:20072

約数の個数: 20

約数和(自身を含む): 33961312

約数和(自身を除く): 12851821

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20047, 60141, 180423, 260611, 541269, 781833, 1623807, 2345499, 7036497, 21109491]

約数ペア:

[(1, 21109491), (3, 7036497), (9, 2345499), (13, 1623807), (27, 781833), (39, 541269), (81, 260611), (117, 180423), (351, 60141), (1053, 20047)]