19995880

素因数分解:

$2^3\times 5^1\times {\mathrm{499897}}^1$

素因数の和:499908

約数の個数: 16

約数和(自身を含む): 44990820

約数和(自身を除く): 24994940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 499897, 999794, 1999588, 2499485, 3999176, 4998970, 9997940, 19995880]

約数ペア:

[(1, 19995880), (2, 9997940), (4, 4998970), (5, 3999176), (8, 2499485), (10, 1999588), (20, 999794), (40, 499897)]