18128925

素因数分解:

$3^2\times 5^2\times {\mathrm{197}}^1\times {\mathrm{409}}^1$

素因数の和:622

約数の個数: 36

約数和(自身を含む): 32715540

約数和(自身を除く): 14586615

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 197, 225, 409, 591, 985, 1227, 1773, 2045, 2955, 3681, 4925, 6135, 8865, 10225, 14775, 18405, 30675, 44325, 80573, 92025, 241719, 402865, 725157, 1208595, 2014325, 3625785, 6042975, 18128925]

約数ペア:

[(1, 18128925), (3, 6042975), (5, 3625785), (9, 2014325), (15, 1208595), (25, 725157), (45, 402865), (75, 241719), (197, 92025), (225, 80573), (409, 44325), (591, 30675), (985, 18405), (1227, 14775), (1773, 10225), (2045, 8865), (2955, 6135), (3681, 4925)]