21996279

素因数分解:

$3^4\times {\mathrm{443}}^1\times {\mathrm{613}}^1$

素因数の和:1068

約数の個数: 20

約数和(自身を含む): 32986536

約数和(自身を除く): 10990257

約数列:

[1, 3, 9, 27, 81, 443, 613, 1329, 1839, 3987, 5517, 11961, 16551, 35883, 49653, 271559, 814677, 2444031, 7332093, 21996279]

約数ペア:

[(1, 21996279), (3, 7332093), (9, 2444031), (27, 814677), (81, 271559), (443, 49653), (613, 35883), (1329, 16551), (1839, 11961), (3987, 5517)]