20680000

素因数分解:

$2^6\times 5^4\times {\mathrm{11}}^1\times {\mathrm{47}}^1$

素因数の和:90

約数の個数: 140

約数和(自身を含む): 57131712

約数和(自身を除く): 36451712

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 25, 32, 40, 44, 47, 50, 55, 64, 80, 88, 94, 100, 110, 125, 160, 176, 188, 200, 220, 235, 250, 275, 320, 352, 376, 400, 440, 470, 500, 517, 550, 625, 704, 752, 800, 880, 940, 1000, 1034, 1100, 1175, 1250, 1375, 1504, 1600, 1760, 1880, 2000, 2068, 2200, 2350, 2500, 2585, 2750, 3008, 3520, 3760, 4000, 4136, 4400, 4700, 5000, 5170, 5500, 5875, 6875, 7520, 8000, 8272, 8800, 9400, 10000, 10340, 11000, 11750, 12925, 13750, 15040, 16544, 17600, 18800, 20000, 20680, 22000, 23500, 25850, 27500, 29375, 33088, 37600, 40000, 41360, 44000, 47000, 51700, 55000, 58750, 64625, 75200, 82720, 88000, 94000, 103400, 110000, 117500, 129250, 165440, 188000, 206800, 220000, 235000, 258500, 323125, 376000, 413600, 440000, 470000, 517000, 646250, 827200, 940000, 1034000, 1292500, 1880000, 2068000, 2585000, 4136000, 5170000, 10340000, 20680000]

約数ペア:

[(1, 20680000), (2, 10340000), (4, 5170000), (5, 4136000), (8, 2585000), (10, 2068000), (11, 1880000), (16, 1292500), (20, 1034000), (22, 940000), (25, 827200), (32, 646250), (40, 517000), (44, 470000), (47, 440000), (50, 413600), (55, 376000), (64, 323125), (80, 258500), (88, 235000), (94, 220000), (100, 206800), (110, 188000), (125, 165440), (160, 129250), (176, 117500), (188, 110000), (200, 103400), (220, 94000), (235, 88000), (250, 82720), (275, 75200), (320, 64625), (352, 58750), (376, 55000), (400, 51700), (440, 47000), (470, 44000), (500, 41360), (517, 40000), (550, 37600), (625, 33088), (704, 29375), (752, 27500), (800, 25850), (880, 23500), (940, 22000), (1000, 20680), (1034, 20000), (1100, 18800), (1175, 17600), (1250, 16544), (1375, 15040), (1504, 13750), (1600, 12925), (1760, 11750), (1880, 11000), (2000, 10340), (2068, 10000), (2200, 9400), (2350, 8800), (2500, 8272), (2585, 8000), (2750, 7520), (3008, 6875), (3520, 5875), (3760, 5500), (4000, 5170), (4136, 5000), (4400, 4700)]