20581918

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{1559}}^1$

素因数の和:1632

約数の個数: 32

約数和(自身を含む): 37739520

約数和(自身を除く): 17157602

約数列:

[1, 2, 7, 14, 23, 41, 46, 82, 161, 287, 322, 574, 943, 1559, 1886, 3118, 6601, 10913, 13202, 21826, 35857, 63919, 71714, 127838, 250999, 447433, 501998, 894866, 1470137, 2940274, 10290959, 20581918]

約数ペア:

[(1, 20581918), (2, 10290959), (7, 2940274), (14, 1470137), (23, 894866), (41, 501998), (46, 447433), (82, 250999), (161, 127838), (287, 71714), (322, 63919), (574, 35857), (943, 21826), (1559, 13202), (1886, 10913), (3118, 6601)]