991567250

素因数分解:

$2^1\times 5^3\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{1049}}^1$

素因数の和:1284

約数の個数: 64

約数和(自身を含む): 1965600000

約数和(自身を除く): 974032750

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 125, 190, 199, 250, 398, 475, 950, 995, 1049, 1990, 2098, 2375, 3781, 4750, 4975, 5245, 7562, 9950, 10490, 18905, 19931, 24875, 26225, 37810, 39862, 49750, 52450, 94525, 99655, 131125, 189050, 199310, 208751, 262250, 417502, 472625, 498275, 945250, 996550, 1043755, 2087510, 2491375, 3966269, 4982750, 5218775, 7932538, 10437550, 19831345, 26093875, 39662690, 52187750, 99156725, 198313450, 495783625, 991567250]

約数ペア:

[(1, 991567250), (2, 495783625), (5, 198313450), (10, 99156725), (19, 52187750), (25, 39662690), (38, 26093875), (50, 19831345), (95, 10437550), (125, 7932538), (190, 5218775), (199, 4982750), (250, 3966269), (398, 2491375), (475, 2087510), (950, 1043755), (995, 996550), (1049, 945250), (1990, 498275), (2098, 472625), (2375, 417502), (3781, 262250), (4750, 208751), (4975, 199310), (5245, 189050), (7562, 131125), (9950, 99655), (10490, 94525), (18905, 52450), (19931, 49750), (24875, 39862), (26225, 37810)]