20281492

素因数分解:

$2^2\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{409}}^1$

素因数の和:461

約数の個数: 72

約数和(自身を含む): 47113920

約数和(自身を除く): 26832428

約数列:

[1, 2, 4, 7, 11, 14, 22, 23, 28, 44, 46, 49, 77, 92, 98, 154, 161, 196, 253, 308, 322, 409, 506, 539, 644, 818, 1012, 1078, 1127, 1636, 1771, 2156, 2254, 2863, 3542, 4499, 4508, 5726, 7084, 8998, 9407, 11452, 12397, 17996, 18814, 20041, 24794, 31493, 37628, 40082, 49588, 62986, 65849, 80164, 103477, 125972, 131698, 206954, 220451, 263396, 413908, 440902, 460943, 724339, 881804, 921886, 1448678, 1843772, 2897356, 5070373, 10140746, 20281492]

約数ペア:

[(1, 20281492), (2, 10140746), (4, 5070373), (7, 2897356), (11, 1843772), (14, 1448678), (22, 921886), (23, 881804), (28, 724339), (44, 460943), (46, 440902), (49, 413908), (77, 263396), (92, 220451), (98, 206954), (154, 131698), (161, 125972), (196, 103477), (253, 80164), (308, 65849), (322, 62986), (409, 49588), (506, 40082), (539, 37628), (644, 31493), (818, 24794), (1012, 20041), (1078, 18814), (1127, 17996), (1636, 12397), (1771, 11452), (2156, 9407), (2254, 8998), (2863, 7084), (3542, 5726), (4499, 4508)]