21189790

素因数分解:

$2^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{15467}}^1$

素因数の和:15611

約数の個数: 16

約数和(自身を含む): 38422512

約数和(自身を除く): 17232722

約数列:

[1, 2, 5, 10, 137, 274, 685, 1370, 15467, 30934, 77335, 154670, 2118979, 4237958, 10594895, 21189790]

約数ペア:

[(1, 21189790), (2, 10594895), (5, 4237958), (10, 2118979), (137, 154670), (274, 77335), (685, 30934), (1370, 15467)]