21885957

素因数分解:

$3^4\times {\mathrm{157}}^1\times {\mathrm{1721}}^1$

素因数の和:1890

約数の個数: 20

約数和(自身を含む): 32921196

約数和(自身を除く): 11035239

約数列:

[1, 3, 9, 27, 81, 157, 471, 1413, 1721, 4239, 5163, 12717, 15489, 46467, 139401, 270197, 810591, 2431773, 7295319, 21885957]

約数ペア:

[(1, 21885957), (3, 7295319), (9, 2431773), (27, 810591), (81, 270197), (157, 139401), (471, 46467), (1413, 15489), (1721, 12717), (4239, 5163)]