20857804

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{4349}}^1$

素因数の和:4473

約数の個数: 24

約数和(自身を含む): 40194000

約数和(自身を除く): 19336196

約数列:

[1, 2, 4, 11, 22, 44, 109, 218, 436, 1199, 2398, 4349, 4796, 8698, 17396, 47839, 95678, 191356, 474041, 948082, 1896164, 5214451, 10428902, 20857804]

約数ペア:

[(1, 20857804), (2, 10428902), (4, 5214451), (11, 1896164), (22, 948082), (44, 474041), (109, 191356), (218, 95678), (436, 47839), (1199, 17396), (2398, 8698), (4349, 4796)]