20881881

素因数分解:

$3^4\times {\mathrm{71}}^1\times {\mathrm{3631}}^1$

素因数の和:3714

約数の個数: 20

約数和(自身を含む): 31641984

約数和(自身を除く): 10760103

約数列:

[1, 3, 9, 27, 71, 81, 213, 639, 1917, 3631, 5751, 10893, 32679, 98037, 257801, 294111, 773403, 2320209, 6960627, 20881881]

約数ペア:

[(1, 20881881), (3, 6960627), (9, 2320209), (27, 773403), (71, 294111), (81, 257801), (213, 98037), (639, 32679), (1917, 10893), (3631, 5751)]