20990090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{173}}^1\times {\mathrm{1103}}^1$

素因数の和:1294

約数の個数: 32

約数和(自身を含む): 41492736

約数和(自身を除く): 20502646

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 173, 346, 865, 1103, 1730, 1903, 2206, 3806, 5515, 9515, 11030, 12133, 19030, 24266, 60665, 121330, 190819, 381638, 954095, 1908190, 2099009, 4198018, 10495045, 20990090]

約数ペア:

[(1, 20990090), (2, 10495045), (5, 4198018), (10, 2099009), (11, 1908190), (22, 954095), (55, 381638), (110, 190819), (173, 121330), (346, 60665), (865, 24266), (1103, 19030), (1730, 12133), (1903, 11030), (2206, 9515), (3806, 5515)]