21000340780

素因数分解:

$2^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{1838909}}^1$

素因数の和:1839489

約数の個数: 24

約数和(自身を含む): 44177973840

約数和(自身を除く): 23177633060

約数列:

[1, 2, 4, 5, 10, 20, 571, 1142, 2284, 2855, 5710, 11420, 1838909, 3677818, 7355636, 9194545, 18389090, 36778180, 1050017039, 2100034078, 4200068156, 5250085195, 10500170390, 21000340780]

約数ペア:

[(1, 21000340780), (2, 10500170390), (4, 5250085195), (5, 4200068156), (10, 2100034078), (20, 1050017039), (571, 36778180), (1142, 18389090), (2284, 9194545), (2855, 7355636), (5710, 3677818), (11420, 1838909)]