19904500

素因数分解:

$2^2\times 5^3\times 7^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1$

素因数の和:95

約数の個数: 144

約数和(自身を含む): 55770624

約数和(自身を除く): 35866124

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 47, 50, 55, 70, 77, 94, 100, 110, 121, 125, 140, 154, 175, 188, 220, 235, 242, 250, 275, 308, 329, 350, 385, 470, 484, 500, 517, 550, 605, 658, 700, 770, 847, 875, 940, 1034, 1100, 1175, 1210, 1316, 1375, 1540, 1645, 1694, 1750, 1925, 2068, 2350, 2420, 2585, 2750, 3025, 3290, 3388, 3500, 3619, 3850, 4235, 4700, 5170, 5500, 5687, 5875, 6050, 6580, 7238, 7700, 8225, 8470, 9625, 10340, 11374, 11750, 12100, 12925, 14476, 15125, 16450, 16940, 18095, 19250, 21175, 22748, 23500, 25850, 28435, 30250, 32900, 36190, 38500, 39809, 41125, 42350, 51700, 56870, 60500, 64625, 72380, 79618, 82250, 84700, 90475, 105875, 113740, 129250, 142175, 159236, 164500, 180950, 199045, 211750, 258500, 284350, 361900, 398090, 423500, 452375, 568700, 710875, 796180, 904750, 995225, 1421750, 1809500, 1990450, 2843500, 3980900, 4976125, 9952250, 19904500]

約数ペア:

[(1, 19904500), (2, 9952250), (4, 4976125), (5, 3980900), (7, 2843500), (10, 1990450), (11, 1809500), (14, 1421750), (20, 995225), (22, 904750), (25, 796180), (28, 710875), (35, 568700), (44, 452375), (47, 423500), (50, 398090), (55, 361900), (70, 284350), (77, 258500), (94, 211750), (100, 199045), (110, 180950), (121, 164500), (125, 159236), (140, 142175), (154, 129250), (175, 113740), (188, 105875), (220, 90475), (235, 84700), (242, 82250), (250, 79618), (275, 72380), (308, 64625), (329, 60500), (350, 56870), (385, 51700), (470, 42350), (484, 41125), (500, 39809), (517, 38500), (550, 36190), (605, 32900), (658, 30250), (700, 28435), (770, 25850), (847, 23500), (875, 22748), (940, 21175), (1034, 19250), (1100, 18095), (1175, 16940), (1210, 16450), (1316, 15125), (1375, 14476), (1540, 12925), (1645, 12100), (1694, 11750), (1750, 11374), (1925, 10340), (2068, 9625), (2350, 8470), (2420, 8225), (2585, 7700), (2750, 7238), (3025, 6580), (3290, 6050), (3388, 5875), (3500, 5687), (3619, 5500), (3850, 5170), (4235, 4700)]