81512560

素因数分解:

$2^4\times 5^1\times {\mathrm{1018907}}^1$

素因数の和:1018920

約数の個数: 20

約数和(自身を含む): 189516888

約数和(自身を除く): 108004328

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1018907, 2037814, 4075628, 5094535, 8151256, 10189070, 16302512, 20378140, 40756280, 81512560]

約数ペア:

[(1, 81512560), (2, 40756280), (4, 20378140), (5, 16302512), (8, 10189070), (10, 8151256), (16, 5094535), (20, 4075628), (40, 2037814), (80, 1018907)]