21815649

素因数分解:

$3^4\times {\mathrm{41}}^1\times {\mathrm{6569}}^1$

素因数の和:6622

約数の個数: 20

約数和(自身を含む): 33388740

約数和(自身を除く): 11573091

約数列:

[1, 3, 9, 27, 41, 81, 123, 369, 1107, 3321, 6569, 19707, 59121, 177363, 269329, 532089, 807987, 2423961, 7271883, 21815649]

約数ペア:

[(1, 21815649), (3, 7271883), (9, 2423961), (27, 807987), (41, 532089), (81, 269329), (123, 177363), (369, 59121), (1107, 19707), (3321, 6569)]