20780080

素因数分解:

$2^4\times 5^1\times {\mathrm{259751}}^1$

素因数の和:259764

約数の個数: 20

約数和(自身を含む): 48313872

約数和(自身を除く): 27533792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259751, 519502, 1039004, 1298755, 2078008, 2597510, 4156016, 5195020, 10390040, 20780080]

約数ペア:

[(1, 20780080), (2, 10390040), (4, 5195020), (5, 4156016), (8, 2597510), (10, 2078008), (16, 1298755), (20, 1039004), (40, 519502), (80, 259751)]