1990311220

素因数分解:

$2^2\times 5^1\times {\mathrm{99515561}}^1$

素因数の和:99515570

約数の個数: 12

約数和(自身を含む): 4179653604

約数和(自身を除く): 2189342384

約数列:

[1, 2, 4, 5, 10, 20, 99515561, 199031122, 398062244, 497577805, 995155610, 1990311220]

約数ペア:

[(1, 1990311220), (2, 995155610), (4, 497577805), (5, 398062244), (10, 199031122), (20, 99515561)]