19818491

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{83}}^1\times {\mathrm{443}}^1$

素因数の和:551

約数の個数: 24

約数和(自身を含む): 25510464

約数和(自身を除く): 5691973

約数列:

[1, 7, 11, 49, 77, 83, 443, 539, 581, 913, 3101, 4067, 4873, 6391, 21707, 34111, 36769, 44737, 238777, 257383, 404459, 1801681, 2831213, 19818491]

約数ペア:

[(1, 19818491), (7, 2831213), (11, 1801681), (49, 404459), (77, 257383), (83, 238777), (443, 44737), (539, 36769), (581, 34111), (913, 21707), (3101, 6391), (4067, 4873)]