7999960

素因数分解:

$2^3\times 5^1\times {\mathrm{199999}}^1$

素因数の和:200010

約数の個数: 16

約数和(自身を含む): 18000000

約数和(自身を除く): 10000040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 199999, 399998, 799996, 999995, 1599992, 1999990, 3999980, 7999960]

約数ペア:

[(1, 7999960), (2, 3999980), (4, 1999990), (5, 1599992), (8, 999995), (10, 799996), (20, 399998), (40, 199999)]