81339260

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{191}}^1\times {\mathrm{199}}^1$

素因数の和:506

約数の個数: 48

約数和(自身を含む): 174182400

約数和(自身を除く): 92843140

約数列:

[1, 2, 4, 5, 10, 20, 107, 191, 199, 214, 382, 398, 428, 535, 764, 796, 955, 995, 1070, 1910, 1990, 2140, 3820, 3980, 20437, 21293, 38009, 40874, 42586, 76018, 81748, 85172, 102185, 106465, 152036, 190045, 204370, 212930, 380090, 408740, 425860, 760180, 4066963, 8133926, 16267852, 20334815, 40669630, 81339260]

約数ペア:

[(1, 81339260), (2, 40669630), (4, 20334815), (5, 16267852), (10, 8133926), (20, 4066963), (107, 760180), (191, 425860), (199, 408740), (214, 380090), (382, 212930), (398, 204370), (428, 190045), (535, 152036), (764, 106465), (796, 102185), (955, 85172), (995, 81748), (1070, 76018), (1910, 42586), (1990, 40874), (2140, 38009), (3820, 21293), (3980, 20437)]