21003073

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{443}}^1\times {\mathrm{521}}^1$

素因数の和:984

約数の個数: 16

約数和(自身を含む): 25958016

約数和(自身を除く): 4954943

約数列:

[1, 7, 13, 91, 443, 521, 3101, 3647, 5759, 6773, 40313, 47411, 230803, 1615621, 3000439, 21003073]

約数ペア:

[(1, 21003073), (7, 3000439), (13, 1615621), (91, 230803), (443, 47411), (521, 40313), (3101, 6773), (3647, 5759)]