81090920

素因数分解:

$2^3\times 5^1\times {\mathrm{359}}^1\times {\mathrm{5647}}^1$

素因数の和:6017

約数の個数: 32

約数和(自身を含む): 182995200

約数和(自身を除く): 101904280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 359, 718, 1436, 1795, 2872, 3590, 5647, 7180, 11294, 14360, 22588, 28235, 45176, 56470, 112940, 225880, 2027273, 4054546, 8109092, 10136365, 16218184, 20272730, 40545460, 81090920]

約数ペア:

[(1, 81090920), (2, 40545460), (4, 20272730), (5, 16218184), (8, 10136365), (10, 8109092), (20, 4054546), (40, 2027273), (359, 225880), (718, 112940), (1436, 56470), (1795, 45176), (2872, 28235), (3590, 22588), (5647, 14360), (7180, 11294)]