21989935

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{1913}}^1$

素因数の和:1959

約数の個数: 24

約数和(自身を含む): 30547440

約数和(自身を除く): 8557505

約数列:

[1, 5, 11, 19, 55, 95, 121, 209, 605, 1045, 1913, 2299, 9565, 11495, 21043, 36347, 105215, 181735, 231473, 399817, 1157365, 1999085, 4397987, 21989935]

約数ペア:

[(1, 21989935), (5, 4397987), (11, 1999085), (19, 1157365), (55, 399817), (95, 231473), (121, 181735), (209, 105215), (605, 36347), (1045, 21043), (1913, 11495), (2299, 9565)]