19908040

素因数分解:

$2^3\times 5^1\times {\mathrm{497701}}^1$

素因数の和:497712

約数の個数: 16

約数和(自身を含む): 44793180

約数和(自身を除く): 24885140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 497701, 995402, 1990804, 2488505, 3981608, 4977010, 9954020, 19908040]

約数ペア:

[(1, 19908040), (2, 9954020), (4, 4977010), (5, 3981608), (8, 2488505), (10, 1990804), (20, 995402), (40, 497701)]