19881640

素因数分解:

$2^3\times 5^1\times {\mathrm{497041}}^1$

素因数の和:497052

約数の個数: 16

約数和(自身を含む): 44733780

約数和(自身を除く): 24852140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497041, 994082, 1988164, 2485205, 3976328, 4970410, 9940820, 19881640]

約数ペア:

[(1, 19881640), (2, 9940820), (4, 4970410), (5, 3976328), (8, 2485205), (10, 1988164), (20, 994082), (40, 497041)]