8015990

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{1999}}^1$

素因数の和:2407

約数の個数: 16

約数和(自身を含む): 14472000

約数和(自身を除く): 6456010

約数列:

[1, 2, 5, 10, 401, 802, 1999, 2005, 3998, 4010, 9995, 19990, 801599, 1603198, 4007995, 8015990]

約数ペア:

[(1, 8015990), (2, 4007995), (5, 1603198), (10, 801599), (401, 19990), (802, 9995), (1999, 4010), (2005, 3998)]