20840840

素因数分解:

$2^3\times 5^1\times {\mathrm{521021}}^1$

素因数の和:521032

約数の個数: 16

約数和(自身を含む): 46891980

約数和(自身を除く): 26051140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521021, 1042042, 2084084, 2605105, 4168168, 5210210, 10420420, 20840840]

約数ペア:

[(1, 20840840), (2, 10420420), (4, 5210210), (5, 4168168), (8, 2605105), (10, 2084084), (20, 1042042), (40, 521021)]