20940020

素因数分解:

$2^2\times 5^1\times {\mathrm{811}}^1\times {\mathrm{1291}}^1$

素因数の和:2111

約数の個数: 24

約数和(自身を含む): 44062368

約数和(自身を除く): 23122348

約数列:

[1, 2, 4, 5, 10, 20, 811, 1291, 1622, 2582, 3244, 4055, 5164, 6455, 8110, 12910, 16220, 25820, 1047001, 2094002, 4188004, 5235005, 10470010, 20940020]

約数ペア:

[(1, 20940020), (2, 10470010), (4, 5235005), (5, 4188004), (10, 2094002), (20, 1047001), (811, 25820), (1291, 16220), (1622, 12910), (2582, 8110), (3244, 6455), (4055, 5164)]