408408080

素因数分解:

$2^4\times 5^1\times {\mathrm{5105101}}^1$

素因数の和:5105114

約数の個数: 20

約数和(自身を含む): 949548972

約数和(自身を除く): 541140892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5105101, 10210202, 20420404, 25525505, 40840808, 51051010, 81681616, 102102020, 204204040, 408408080]

約数ペア:

[(1, 408408080), (2, 204204040), (4, 102102020), (5, 81681616), (8, 51051010), (10, 40840808), (16, 25525505), (20, 20420404), (40, 10210202), (80, 5105101)]