20681480

素因数分解:

$2^3\times 5^1\times {\mathrm{191}}^1\times {\mathrm{2707}}^1$

素因数の和:2909

約数の個数: 32

約数和(自身を含む): 46794240

約数和(自身を除く): 26112760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 191, 382, 764, 955, 1528, 1910, 2707, 3820, 5414, 7640, 10828, 13535, 21656, 27070, 54140, 108280, 517037, 1034074, 2068148, 2585185, 4136296, 5170370, 10340740, 20681480]

約数ペア:

[(1, 20681480), (2, 10340740), (4, 5170370), (5, 4136296), (8, 2585185), (10, 2068148), (20, 1034074), (40, 517037), (191, 108280), (382, 54140), (764, 27070), (955, 21656), (1528, 13535), (1910, 10828), (2707, 7640), (3820, 5414)]