20908910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131}}^1\times {\mathrm{1451}}^1$

素因数の和:1600

約数の個数: 32

約数和(自身を含む): 41399424

約数和(自身を除く): 20490514

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 131, 262, 655, 1310, 1441, 1451, 2882, 2902, 7205, 7255, 14410, 14510, 15961, 31922, 79805, 159610, 190081, 380162, 950405, 1900810, 2090891, 4181782, 10454455, 20908910]

約数ペア:

[(1, 20908910), (2, 10454455), (5, 4181782), (10, 2090891), (11, 1900810), (22, 950405), (55, 380162), (110, 190081), (131, 159610), (262, 79805), (655, 31922), (1310, 15961), (1441, 14510), (1451, 14410), (2882, 7255), (2902, 7205)]