21492880

素因数分解:

$2^4\times 5^1\times {\mathrm{268661}}^1$

素因数の和:268674

約数の個数: 20

約数和(自身を含む): 49971132

約数和(自身を除く): 28478252

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 268661, 537322, 1074644, 1343305, 2149288, 2686610, 4298576, 5373220, 10746440, 21492880]

約数ペア:

[(1, 21492880), (2, 10746440), (4, 5373220), (5, 4298576), (8, 2686610), (10, 2149288), (16, 1343305), (20, 1074644), (40, 537322), (80, 268661)]