21564387

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20479}}^1$

素因数の和:20504

約数の個数: 20

約数和(自身を含む): 34693120

約数和(自身を除く): 13128733

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20479, 61437, 184311, 266227, 552933, 798681, 1658799, 2396043, 7188129, 21564387]

約数ペア:

[(1, 21564387), (3, 7188129), (9, 2396043), (13, 1658799), (27, 798681), (39, 552933), (81, 266227), (117, 184311), (351, 61437), (1053, 20479)]