256207250

素因数分解:

$2^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{2543}}^1$

素因数の和:2604

約数の個数: 64

約数和(自身を含む): 533385216

約数和(自身を除く): 277177966

約数列:

[1, 2, 5, 10, 13, 25, 26, 31, 50, 62, 65, 125, 130, 155, 250, 310, 325, 403, 650, 775, 806, 1550, 1625, 2015, 2543, 3250, 3875, 4030, 5086, 7750, 10075, 12715, 20150, 25430, 33059, 50375, 63575, 66118, 78833, 100750, 127150, 157666, 165295, 317875, 330590, 394165, 635750, 788330, 826475, 1024829, 1652950, 1970825, 2049658, 3941650, 4132375, 5124145, 8264750, 9854125, 10248290, 19708250, 25620725, 51241450, 128103625, 256207250]

約数ペア:

[(1, 256207250), (2, 128103625), (5, 51241450), (10, 25620725), (13, 19708250), (25, 10248290), (26, 9854125), (31, 8264750), (50, 5124145), (62, 4132375), (65, 3941650), (125, 2049658), (130, 1970825), (155, 1652950), (250, 1024829), (310, 826475), (325, 788330), (403, 635750), (650, 394165), (775, 330590), (806, 317875), (1550, 165295), (1625, 157666), (2015, 127150), (2543, 100750), (3250, 78833), (3875, 66118), (4030, 63575), (5086, 50375), (7750, 33059), (10075, 25430), (12715, 20150)]