20809789

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{20789}}^1$

素因数の和:20820

約数の個数: 16

約数和(自身を含む): 27941760

約数和(自身を除く): 7131971

約数列:

[1, 7, 11, 13, 77, 91, 143, 1001, 20789, 145523, 228679, 270257, 1600753, 1891799, 2972827, 20809789]

約数ペア:

[(1, 20809789), (7, 2972827), (11, 1891799), (13, 1600753), (77, 270257), (91, 228679), (143, 145523), (1001, 20789)]