40800040

素因数分解:

$2^3\times 5^1\times {\mathrm{1020001}}^1$

素因数の和:1020012

約数の個数: 16

約数和(自身を含む): 91800180

約数和(自身を除く): 51000140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1020001, 2040002, 4080004, 5100005, 8160008, 10200010, 20400020, 40800040]

約数ペア:

[(1, 40800040), (2, 20400020), (4, 10200010), (5, 8160008), (8, 5100005), (10, 4080004), (20, 2040002), (40, 1020001)]