19968663

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{523}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 31691520

約数和(自身を除く): 11722857

約数列:

[1, 3, 11, 13, 33, 39, 89, 143, 267, 429, 523, 979, 1157, 1569, 2937, 3471, 5753, 6799, 12727, 17259, 20397, 38181, 46547, 74789, 139641, 224367, 512017, 605111, 1536051, 1815333, 6656221, 19968663]

約数ペア:

[(1, 19968663), (3, 6656221), (11, 1815333), (13, 1536051), (33, 605111), (39, 512017), (89, 224367), (143, 139641), (267, 74789), (429, 46547), (523, 38181), (979, 20397), (1157, 17259), (1569, 12727), (2937, 6799), (3471, 5753)]