20420080

素因数分解:

$2^4\times 5^1\times {\mathrm{255251}}^1$

素因数の和:255264

約数の個数: 20

約数和(自身を含む): 47476872

約数和(自身を除く): 27056792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255251, 510502, 1021004, 1276255, 2042008, 2552510, 4084016, 5105020, 10210040, 20420080]

約数ペア:

[(1, 20420080), (2, 10210040), (4, 5105020), (5, 4084016), (8, 2552510), (10, 2042008), (16, 1276255), (20, 1021004), (40, 510502), (80, 255251)]