21289177

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1759}}^1$

素因数の和:1805

約数の個数: 24

約数和(自身を含む): 28089600

約数和(自身を除く): 6800423

約数列:

[1, 7, 13, 19, 49, 91, 133, 247, 637, 931, 1729, 1759, 12103, 12313, 22867, 33421, 86191, 160069, 233947, 434473, 1120483, 1637629, 3041311, 21289177]

約数ペア:

[(1, 21289177), (7, 3041311), (13, 1637629), (19, 1120483), (49, 434473), (91, 233947), (133, 160069), (247, 86191), (637, 33421), (931, 22867), (1729, 12313), (1759, 12103)]