128565940

素因数分解:

$2^2\times 5^1\times {\mathrm{199}}^1\times {\mathrm{32303}}^1$

素因数の和:32511

約数の個数: 24

約数和(自身を含む): 271353600

約数和(自身を除く): 142787660

約数列:

[1, 2, 4, 5, 10, 20, 199, 398, 796, 995, 1990, 3980, 32303, 64606, 129212, 161515, 323030, 646060, 6428297, 12856594, 25713188, 32141485, 64282970, 128565940]

約数ペア:

[(1, 128565940), (2, 64282970), (4, 32141485), (5, 25713188), (10, 12856594), (20, 6428297), (199, 646060), (398, 323030), (796, 161515), (995, 129212), (1990, 64606), (3980, 32303)]