20550740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{181}}^1\times {\mathrm{811}}^1$

素因数の和:1008

約数の個数: 48

約数和(自身を含む): 49655424

約数和(自身を除く): 29104684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 181, 362, 724, 811, 905, 1267, 1622, 1810, 2534, 3244, 3620, 4055, 5068, 5677, 6335, 8110, 11354, 12670, 16220, 22708, 25340, 28385, 56770, 113540, 146791, 293582, 587164, 733955, 1027537, 1467910, 2055074, 2935820, 4110148, 5137685, 10275370, 20550740]

約数ペア:

[(1, 20550740), (2, 10275370), (4, 5137685), (5, 4110148), (7, 2935820), (10, 2055074), (14, 1467910), (20, 1027537), (28, 733955), (35, 587164), (70, 293582), (140, 146791), (181, 113540), (362, 56770), (724, 28385), (811, 25340), (905, 22708), (1267, 16220), (1622, 12670), (1810, 11354), (2534, 8110), (3244, 6335), (3620, 5677), (4055, 5068)]