8139100

素因数分解:

$2^2\times 5^2\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:622

約数の個数: 36

約数和(自身を含む): 17794000

約数和(自身を除く): 9654900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 199, 398, 409, 796, 818, 995, 1636, 1990, 2045, 3980, 4090, 4975, 8180, 9950, 10225, 19900, 20450, 40900, 81391, 162782, 325564, 406955, 813910, 1627820, 2034775, 4069550, 8139100]

約数ペア:

[(1, 8139100), (2, 4069550), (4, 2034775), (5, 1627820), (10, 813910), (20, 406955), (25, 325564), (50, 162782), (100, 81391), (199, 40900), (398, 20450), (409, 19900), (796, 10225), (818, 9950), (995, 8180), (1636, 4975), (1990, 4090), (2045, 3980)]