21806323

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{1759}}^1$

素因数の和:1807

約数の個数: 24

約数和(自身を含む): 28892160

約数和(自身を除く): 7085837

約数列:

[1, 7, 11, 23, 49, 77, 161, 253, 539, 1127, 1759, 1771, 12313, 12397, 19349, 40457, 86191, 135443, 283199, 445027, 948101, 1982393, 3115189, 21806323]

約数ペア:

[(1, 21806323), (7, 3115189), (11, 1982393), (23, 948101), (49, 445027), (77, 283199), (161, 135443), (253, 86191), (539, 40457), (1127, 19349), (1759, 12397), (1771, 12313)]