8159000

素因数分解:

$2^3\times 5^3\times {\mathrm{41}}^1\times {\mathrm{199}}^1$

素因数の和:261

約数の個数: 64

約数和(自身を含む): 19656000

約数和(自身を除く): 11497000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 41, 50, 82, 100, 125, 164, 199, 200, 205, 250, 328, 398, 410, 500, 796, 820, 995, 1000, 1025, 1592, 1640, 1990, 2050, 3980, 4100, 4975, 5125, 7960, 8159, 8200, 9950, 10250, 16318, 19900, 20500, 24875, 32636, 39800, 40795, 41000, 49750, 65272, 81590, 99500, 163180, 199000, 203975, 326360, 407950, 815900, 1019875, 1631800, 2039750, 4079500, 8159000]

約数ペア:

[(1, 8159000), (2, 4079500), (4, 2039750), (5, 1631800), (8, 1019875), (10, 815900), (20, 407950), (25, 326360), (40, 203975), (41, 199000), (50, 163180), (82, 99500), (100, 81590), (125, 65272), (164, 49750), (199, 41000), (200, 40795), (205, 39800), (250, 32636), (328, 24875), (398, 20500), (410, 19900), (500, 16318), (796, 10250), (820, 9950), (995, 8200), (1000, 8159), (1025, 7960), (1592, 5125), (1640, 4975), (1990, 4100), (2050, 3980)]