20689900

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{2687}}^1$

素因数の和:2719

約数の個数: 72

約数和(自身を含む): 55996416

約数和(自身を除く): 35306516

約数列:

[1, 2, 4, 5, 7, 10, 11, 14, 20, 22, 25, 28, 35, 44, 50, 55, 70, 77, 100, 110, 140, 154, 175, 220, 275, 308, 350, 385, 550, 700, 770, 1100, 1540, 1925, 2687, 3850, 5374, 7700, 10748, 13435, 18809, 26870, 29557, 37618, 53740, 59114, 67175, 75236, 94045, 118228, 134350, 147785, 188090, 206899, 268700, 295570, 376180, 413798, 470225, 591140, 738925, 827596, 940450, 1034495, 1477850, 1880900, 2068990, 2955700, 4137980, 5172475, 10344950, 20689900]

約数ペア:

[(1, 20689900), (2, 10344950), (4, 5172475), (5, 4137980), (7, 2955700), (10, 2068990), (11, 1880900), (14, 1477850), (20, 1034495), (22, 940450), (25, 827596), (28, 738925), (35, 591140), (44, 470225), (50, 413798), (55, 376180), (70, 295570), (77, 268700), (100, 206899), (110, 188090), (140, 147785), (154, 134350), (175, 118228), (220, 94045), (275, 75236), (308, 67175), (350, 59114), (385, 53740), (550, 37618), (700, 29557), (770, 26870), (1100, 18809), (1540, 13435), (1925, 10748), (2687, 7700), (3850, 5374)]