20785820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{883}}^1$

素因数の和:1010

約数の個数: 48

約数和(自身を含む): 48117888

約数和(自身を除く): 27332068

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 107, 110, 214, 220, 428, 535, 883, 1070, 1177, 1766, 2140, 2354, 3532, 4415, 4708, 5885, 8830, 9713, 11770, 17660, 19426, 23540, 38852, 48565, 94481, 97130, 188962, 194260, 377924, 472405, 944810, 1039291, 1889620, 2078582, 4157164, 5196455, 10392910, 20785820]

約数ペア:

[(1, 20785820), (2, 10392910), (4, 5196455), (5, 4157164), (10, 2078582), (11, 1889620), (20, 1039291), (22, 944810), (44, 472405), (55, 377924), (107, 194260), (110, 188962), (214, 97130), (220, 94481), (428, 48565), (535, 38852), (883, 23540), (1070, 19426), (1177, 17660), (1766, 11770), (2140, 9713), (2354, 8830), (3532, 5885), (4415, 4708)]