21980080

素因数分解:

$2^4\times 5^1\times {\mathrm{274751}}^1$

素因数の和:274764

約数の個数: 20

約数和(自身を含む): 51103872

約数和(自身を除く): 29123792

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 274751, 549502, 1099004, 1373755, 2198008, 2747510, 4396016, 5495020, 10990040, 21980080]

約数ペア:

[(1, 21980080), (2, 10990040), (4, 5495020), (5, 4396016), (8, 2747510), (10, 2198008), (16, 1373755), (20, 1099004), (40, 549502), (80, 274751)]