39919820

素因数分解:

$2^2\times 5^1\times {\mathrm{1995991}}^1$

素因数の和:1996000

約数の個数: 12

約数和(自身を含む): 83831664

約数和(自身を除く): 43911844

約数列:

[1, 2, 4, 5, 10, 20, 1995991, 3991982, 7983964, 9979955, 19959910, 39919820]

約数ペア:

[(1, 39919820), (2, 19959910), (4, 9979955), (5, 7983964), (10, 3991982), (20, 1995991)]