20845250

素因数分解:

$2^1\times 5^3\times {\mathrm{199}}^1\times {\mathrm{419}}^1$

素因数の和:635

約数の個数: 32

約数和(自身を含む): 39312000

約数和(自身を除く): 18466750

約数列:

[1, 2, 5, 10, 25, 50, 125, 199, 250, 398, 419, 838, 995, 1990, 2095, 4190, 4975, 9950, 10475, 20950, 24875, 49750, 52375, 83381, 104750, 166762, 416905, 833810, 2084525, 4169050, 10422625, 20845250]

約数ペア:

[(1, 20845250), (2, 10422625), (5, 4169050), (10, 2084525), (25, 833810), (50, 416905), (125, 166762), (199, 104750), (250, 83381), (398, 52375), (419, 49750), (838, 24875), (995, 20950), (1990, 10475), (2095, 9950), (4190, 4975)]