80712880

素因数分解:

$2^4\times 5^1\times {\mathrm{1008911}}^1$

素因数の和:1008924

約数の個数: 20

約数和(自身を含む): 187657632

約数和(自身を除く): 106944752

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1008911, 2017822, 4035644, 5044555, 8071288, 10089110, 16142576, 20178220, 40356440, 80712880]

約数ペア:

[(1, 80712880), (2, 40356440), (4, 20178220), (5, 16142576), (8, 10089110), (10, 8071288), (16, 5044555), (20, 4035644), (40, 2017822), (80, 1008911)]