21590205

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{15817}}^1$

素因数の和:15845

約数の個数: 32

約数和(自身を含む): 42518784

約数和(自身を除く): 20928579

約数列:

[1, 3, 5, 7, 13, 15, 21, 35, 39, 65, 91, 105, 195, 273, 455, 1365, 15817, 47451, 79085, 110719, 205621, 237255, 332157, 553595, 616863, 1028105, 1439347, 1660785, 3084315, 4318041, 7196735, 21590205]

約数ペア:

[(1, 21590205), (3, 7196735), (5, 4318041), (7, 3084315), (13, 1660785), (15, 1439347), (21, 1028105), (35, 616863), (39, 553595), (65, 332157), (91, 237255), (105, 205621), (195, 110719), (273, 79085), (455, 47451), (1365, 15817)]