81176080

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{5099}}^1$

素因数の和:5311

約数の個数: 40

約数和(自身を含む): 189720000

約数和(自身を除く): 108543920

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 5099, 7960, 10198, 15920, 20396, 25495, 40792, 50990, 81584, 101980, 203960, 407920, 1014701, 2029402, 4058804, 5073505, 8117608, 10147010, 16235216, 20294020, 40588040, 81176080]

約数ペア:

[(1, 81176080), (2, 40588040), (4, 20294020), (5, 16235216), (8, 10147010), (10, 8117608), (16, 5073505), (20, 4058804), (40, 2029402), (80, 1014701), (199, 407920), (398, 203960), (796, 101980), (995, 81584), (1592, 50990), (1990, 40792), (3184, 25495), (3980, 20396), (5099, 15920), (7960, 10198)]