21349315

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{8011}}^1$

素因数の和:8070

約数の個数: 16

約数和(自身を含む): 28266336

約数和(自身を除く): 6917021

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 8011, 40055, 104143, 328451, 520715, 1642255, 4269863, 21349315]

約数ペア:

[(1, 21349315), (5, 4269863), (13, 1642255), (41, 520715), (65, 328451), (205, 104143), (533, 40055), (2665, 8011)]