18790221

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{4643}}^1$

素因数の和:4736

約数の個数: 16

約数和(自身を含む): 26749440

約数和(自身を除く): 7959219

約数列:

[1, 3, 19, 57, 71, 213, 1349, 4047, 4643, 13929, 88217, 264651, 329653, 988959, 6263407, 18790221]

約数ペア:

[(1, 18790221), (3, 6263407), (19, 988959), (57, 329653), (71, 264651), (213, 88217), (1349, 13929), (4047, 4643)]