20806000

素因数分解:

$2^4\times 5^3\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:227

約数の個数: 80

約数和(自身を含む): 51300288

約数和(自身を除く): 30494288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 103, 125, 200, 202, 206, 250, 400, 404, 412, 500, 505, 515, 808, 824, 1000, 1010, 1030, 1616, 1648, 2000, 2020, 2060, 2525, 2575, 4040, 4120, 5050, 5150, 8080, 8240, 10100, 10300, 10403, 12625, 12875, 20200, 20600, 20806, 25250, 25750, 40400, 41200, 41612, 50500, 51500, 52015, 83224, 101000, 103000, 104030, 166448, 202000, 206000, 208060, 260075, 416120, 520150, 832240, 1040300, 1300375, 2080600, 2600750, 4161200, 5201500, 10403000, 20806000]

約数ペア:

[(1, 20806000), (2, 10403000), (4, 5201500), (5, 4161200), (8, 2600750), (10, 2080600), (16, 1300375), (20, 1040300), (25, 832240), (40, 520150), (50, 416120), (80, 260075), (100, 208060), (101, 206000), (103, 202000), (125, 166448), (200, 104030), (202, 103000), (206, 101000), (250, 83224), (400, 52015), (404, 51500), (412, 50500), (500, 41612), (505, 41200), (515, 40400), (808, 25750), (824, 25250), (1000, 20806), (1010, 20600), (1030, 20200), (1616, 12875), (1648, 12625), (2000, 10403), (2020, 10300), (2060, 10100), (2525, 8240), (2575, 8080), (4040, 5150), (4120, 5050)]