21897520

素因数分解:

$2^4\times 5^1\times {\mathrm{273719}}^1$

素因数の和:273732

約数の個数: 20

約数和(自身を含む): 50911920

約数和(自身を除く): 29014400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 273719, 547438, 1094876, 1368595, 2189752, 2737190, 4379504, 5474380, 10948760, 21897520]

約数ペア:

[(1, 21897520), (2, 10948760), (4, 5474380), (5, 4379504), (8, 2737190), (10, 2189752), (16, 1368595), (20, 1094876), (40, 547438), (80, 273719)]