20909924

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{15889}}^1$

素因数の和:15947

約数の個数: 24

約数和(自身を含む): 42712320

約数和(自身を除く): 21802396

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 15889, 31778, 63556, 111223, 222446, 444892, 746783, 1493566, 2987132, 5227481, 10454962, 20909924]

約数ペア:

[(1, 20909924), (2, 10454962), (4, 5227481), (7, 2987132), (14, 1493566), (28, 746783), (47, 444892), (94, 222446), (188, 111223), (329, 63556), (658, 31778), (1316, 15889)]