20090819

素因数分解:

$7^1\times {\mathrm{101}}^1\times {\mathrm{157}}^1\times {\mathrm{181}}^1$

素因数の和:446

約数の個数: 16

約数和(自身を含む): 23464896

約数和(自身を除く): 3374077

約数列:

[1, 7, 101, 157, 181, 707, 1099, 1267, 15857, 18281, 28417, 110999, 127967, 198919, 2870117, 20090819]

約数ペア:

[(1, 20090819), (7, 2870117), (101, 198919), (157, 127967), (181, 110999), (707, 28417), (1099, 18281), (1267, 15857)]