21309260

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{8011}}^1$

素因数の和:8046

約数の個数: 48

約数和(自身を含む): 53840640

約数和(自身を除く): 32531380

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 8011, 16022, 32044, 40055, 56077, 80110, 112154, 152209, 160220, 224308, 280385, 304418, 560770, 608836, 761045, 1065463, 1121540, 1522090, 2130926, 3044180, 4261852, 5327315, 10654630, 21309260]

約数ペア:

[(1, 21309260), (2, 10654630), (4, 5327315), (5, 4261852), (7, 3044180), (10, 2130926), (14, 1522090), (19, 1121540), (20, 1065463), (28, 761045), (35, 608836), (38, 560770), (70, 304418), (76, 280385), (95, 224308), (133, 160220), (140, 152209), (190, 112154), (266, 80110), (380, 56077), (532, 40055), (665, 32044), (1330, 16022), (2660, 8011)]