21432280

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3911}}^1$

素因数の和:4059

約数の個数: 32

約数和(自身を含む): 48587040

約数和(自身を除く): 27154760

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3911, 5480, 7822, 15644, 19555, 31288, 39110, 78220, 156440, 535807, 1071614, 2143228, 2679035, 4286456, 5358070, 10716140, 21432280]

約数ペア:

[(1, 21432280), (2, 10716140), (4, 5358070), (5, 4286456), (8, 2679035), (10, 2143228), (20, 1071614), (40, 535807), (137, 156440), (274, 78220), (548, 39110), (685, 31288), (1096, 19555), (1370, 15644), (2740, 7822), (3911, 5480)]