20987195408

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{83}}^1\times {\mathrm{831769}}^1$

素因数の和:831879

約数の個数: 40

約数和(自身を含む): 43318581600

約数和(自身を除く): 22331386192

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 83, 152, 166, 304, 332, 664, 1328, 1577, 3154, 6308, 12616, 25232, 831769, 1663538, 3327076, 6654152, 13308304, 15803611, 31607222, 63214444, 69036827, 126428888, 138073654, 252857776, 276147308, 552294616, 1104589232, 1311699713, 2623399426, 5246798852, 10493597704, 20987195408]

約数ペア:

[(1, 20987195408), (2, 10493597704), (4, 5246798852), (8, 2623399426), (16, 1311699713), (19, 1104589232), (38, 552294616), (76, 276147308), (83, 252857776), (152, 138073654), (166, 126428888), (304, 69036827), (332, 63214444), (664, 31607222), (1328, 15803611), (1577, 13308304), (3154, 6654152), (6308, 3327076), (12616, 1663538), (25232, 831769)]