20428080

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{1811}}^1$

素因数の和:1874

約数の個数: 80

約数和(自身を含む): 64710144

約数和(自身を除く): 44282064

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 47, 48, 60, 80, 94, 120, 141, 188, 235, 240, 282, 376, 470, 564, 705, 752, 940, 1128, 1410, 1811, 1880, 2256, 2820, 3622, 3760, 5433, 5640, 7244, 9055, 10866, 11280, 14488, 18110, 21732, 27165, 28976, 36220, 43464, 54330, 72440, 85117, 86928, 108660, 144880, 170234, 217320, 255351, 340468, 425585, 434640, 510702, 680936, 851170, 1021404, 1276755, 1361872, 1702340, 2042808, 2553510, 3404680, 4085616, 5107020, 6809360, 10214040, 20428080]

約数ペア:

[(1, 20428080), (2, 10214040), (3, 6809360), (4, 5107020), (5, 4085616), (6, 3404680), (8, 2553510), (10, 2042808), (12, 1702340), (15, 1361872), (16, 1276755), (20, 1021404), (24, 851170), (30, 680936), (40, 510702), (47, 434640), (48, 425585), (60, 340468), (80, 255351), (94, 217320), (120, 170234), (141, 144880), (188, 108660), (235, 86928), (240, 85117), (282, 72440), (376, 54330), (470, 43464), (564, 36220), (705, 28976), (752, 27165), (940, 21732), (1128, 18110), (1410, 14488), (1811, 11280), (1880, 10866), (2256, 9055), (2820, 7244), (3622, 5640), (3760, 5433)]