3999920

素因数分解:

$2^4\times 5^1\times {\mathrm{49999}}^1$

素因数の和:50012

約数の個数: 20

約数和(自身を含む): 9300000

約数和(自身を除く): 5300080

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 49999, 99998, 199996, 249995, 399992, 499990, 799984, 999980, 1999960, 3999920]

約数ペア:

[(1, 3999920), (2, 1999960), (4, 999980), (5, 799984), (8, 499990), (10, 399992), (16, 249995), (20, 199996), (40, 99998), (80, 49999)]