21800080

素因数分解:

$2^4\times 5^1\times {\mathrm{379}}^1\times {\mathrm{719}}^1$

素因数の和:1111

約数の個数: 40

約数和(自身を含む): 50889600

約数和(自身を除く): 29089520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 379, 719, 758, 1438, 1516, 1895, 2876, 3032, 3595, 3790, 5752, 6064, 7190, 7580, 11504, 14380, 15160, 28760, 30320, 57520, 272501, 545002, 1090004, 1362505, 2180008, 2725010, 4360016, 5450020, 10900040, 21800080]

約数ペア:

[(1, 21800080), (2, 10900040), (4, 5450020), (5, 4360016), (8, 2725010), (10, 2180008), (16, 1362505), (20, 1090004), (40, 545002), (80, 272501), (379, 57520), (719, 30320), (758, 28760), (1438, 15160), (1516, 14380), (1895, 11504), (2876, 7580), (3032, 7190), (3595, 6064), (3790, 5752)]