21025520

素因数分解:

$2^4\times 5^1\times {\mathrm{262819}}^1$

素因数の和:262832

約数の個数: 20

約数和(自身を含む): 48884520

約数和(自身を除く): 27859000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 262819, 525638, 1051276, 1314095, 2102552, 2628190, 4205104, 5256380, 10512760, 21025520]

約数ペア:

[(1, 21025520), (2, 10512760), (4, 5256380), (5, 4205104), (8, 2628190), (10, 2102552), (16, 1314095), (20, 1051276), (40, 525638), (80, 262819)]