396985990

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{98999}}^1$

素因数の和:99407

約数の個数: 16

約数和(自身を含む): 716364000

約数和(自身を除く): 319378010

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 98999, 197998, 494995, 989990, 39698599, 79397198, 198492995, 396985990]

約数ペア:

[(1, 396985990), (2, 198492995), (5, 79397198), (10, 39698599), (401, 989990), (802, 494995), (2005, 197998), (4010, 98999)]