80200040

素因数分解:

$2^3\times 5^1\times {\mathrm{2005001}}^1$

素因数の和:2005012

約数の個数: 16

約数和(自身を含む): 180450180

約数和(自身を除く): 100250140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2005001, 4010002, 8020004, 10025005, 16040008, 20050010, 40100020, 80200040]

約数ペア:

[(1, 80200040), (2, 40100020), (4, 20050010), (5, 16040008), (8, 10025005), (10, 8020004), (20, 4010002), (40, 2005001)]