20870444

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{15859}}^1$

素因数の和:15917

約数の個数: 24

約数和(自身を含む): 42631680

約数和(自身を除く): 21761236

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 188, 329, 658, 1316, 15859, 31718, 63436, 111013, 222026, 444052, 745373, 1490746, 2981492, 5217611, 10435222, 20870444]

約数ペア:

[(1, 20870444), (2, 10435222), (4, 5217611), (7, 2981492), (14, 1490746), (28, 745373), (47, 444052), (94, 222026), (188, 111013), (329, 63436), (658, 31718), (1316, 15859)]