20347750

素因数分解:

$2^1\times 5^3\times {\mathrm{199}}^1\times {\mathrm{409}}^1$

素因数の和:625

約数の個数: 32

約数和(自身を含む): 38376000

約数和(自身を除く): 18028250

約数列:

[1, 2, 5, 10, 25, 50, 125, 199, 250, 398, 409, 818, 995, 1990, 2045, 4090, 4975, 9950, 10225, 20450, 24875, 49750, 51125, 81391, 102250, 162782, 406955, 813910, 2034775, 4069550, 10173875, 20347750]

約数ペア:

[(1, 20347750), (2, 10173875), (5, 4069550), (10, 2034775), (25, 813910), (50, 406955), (125, 162782), (199, 102250), (250, 81391), (398, 51125), (409, 49750), (818, 24875), (995, 20450), (1990, 10225), (2045, 9950), (4090, 4975)]