20807204980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1\times {\mathrm{26387}}^1$

素因数の和:26928

約数の個数: 48

約数和(自身を含む): 44287508160

約数和(自身を除く): 23480303180

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 443, 445, 886, 890, 1772, 1780, 2215, 4430, 8860, 26387, 39427, 52774, 78854, 105548, 131935, 157708, 197135, 263870, 394270, 527740, 788540, 2348443, 4696886, 9393772, 11689441, 11742215, 23378882, 23484430, 46757764, 46968860, 58447205, 116894410, 233788820, 1040360249, 2080720498, 4161440996, 5201801245, 10403602490, 20807204980]

約数ペア:

[(1, 20807204980), (2, 10403602490), (4, 5201801245), (5, 4161440996), (10, 2080720498), (20, 1040360249), (89, 233788820), (178, 116894410), (356, 58447205), (443, 46968860), (445, 46757764), (886, 23484430), (890, 23378882), (1772, 11742215), (1780, 11689441), (2215, 9393772), (4430, 4696886), (8860, 2348443), (26387, 788540), (39427, 527740), (52774, 394270), (78854, 263870), (105548, 197135), (131935, 157708)]