20848660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1087}}^1$

素因数の和:1240

約数の個数: 48

約数和(自身を含む): 50448384

約数和(自身を除く): 29599724

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1087, 1370, 1918, 2174, 2740, 3836, 4348, 4795, 5435, 7609, 9590, 10870, 15218, 19180, 21740, 30436, 38045, 76090, 148919, 152180, 297838, 595676, 744595, 1042433, 1489190, 2084866, 2978380, 4169732, 5212165, 10424330, 20848660]

約数ペア:

[(1, 20848660), (2, 10424330), (4, 5212165), (5, 4169732), (7, 2978380), (10, 2084866), (14, 1489190), (20, 1042433), (28, 744595), (35, 595676), (70, 297838), (137, 152180), (140, 148919), (274, 76090), (548, 38045), (685, 30436), (959, 21740), (1087, 19180), (1370, 15218), (1918, 10870), (2174, 9590), (2740, 7609), (3836, 5435), (4348, 4795)]