20891643

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{107}}^1\times {\mathrm{1759}}^1$

素因数の和:1906

約数の個数: 16

約数和(自身を含む): 28892160

約数和(自身を除く): 8000517

約数列:

[1, 3, 37, 107, 111, 321, 1759, 3959, 5277, 11877, 65083, 188213, 195249, 564639, 6963881, 20891643]

約数ペア:

[(1, 20891643), (3, 6963881), (37, 564639), (107, 195249), (111, 188213), (321, 65083), (1759, 11877), (3959, 5277)]