20982500

素因数分解:

$2^2\times 5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1$

素因数の和:151

約数の個数: 120

約数和(自身を含む): 57731520

約数和(自身を除く): 36749020

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 109, 110, 125, 140, 154, 175, 218, 220, 250, 275, 308, 350, 385, 436, 500, 545, 550, 625, 700, 763, 770, 875, 1090, 1100, 1199, 1250, 1375, 1526, 1540, 1750, 1925, 2180, 2398, 2500, 2725, 2750, 3052, 3500, 3815, 3850, 4375, 4796, 5450, 5500, 5995, 6875, 7630, 7700, 8393, 8750, 9625, 10900, 11990, 13625, 13750, 15260, 16786, 17500, 19075, 19250, 23980, 27250, 27500, 29975, 33572, 38150, 38500, 41965, 48125, 54500, 59950, 68125, 76300, 83930, 95375, 96250, 119900, 136250, 149875, 167860, 190750, 192500, 209825, 272500, 299750, 381500, 419650, 476875, 599500, 749375, 839300, 953750, 1049125, 1498750, 1907500, 2098250, 2997500, 4196500, 5245625, 10491250, 20982500]

約数ペア:

[(1, 20982500), (2, 10491250), (4, 5245625), (5, 4196500), (7, 2997500), (10, 2098250), (11, 1907500), (14, 1498750), (20, 1049125), (22, 953750), (25, 839300), (28, 749375), (35, 599500), (44, 476875), (50, 419650), (55, 381500), (70, 299750), (77, 272500), (100, 209825), (109, 192500), (110, 190750), (125, 167860), (140, 149875), (154, 136250), (175, 119900), (218, 96250), (220, 95375), (250, 83930), (275, 76300), (308, 68125), (350, 59950), (385, 54500), (436, 48125), (500, 41965), (545, 38500), (550, 38150), (625, 33572), (700, 29975), (763, 27500), (770, 27250), (875, 23980), (1090, 19250), (1100, 19075), (1199, 17500), (1250, 16786), (1375, 15260), (1526, 13750), (1540, 13625), (1750, 11990), (1925, 10900), (2180, 9625), (2398, 8750), (2500, 8393), (2725, 7700), (2750, 7630), (3052, 6875), (3500, 5995), (3815, 5500), (3850, 5450), (4375, 4796)]