20664259

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{787}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 26829824

約数和(自身を除く): 6165565

約数列:

[1, 7, 11, 31, 77, 121, 217, 341, 787, 847, 2387, 3751, 5509, 8657, 24397, 26257, 60599, 95227, 170779, 268367, 666589, 1878569, 2952037, 20664259]

約数ペア:

[(1, 20664259), (7, 2952037), (11, 1878569), (31, 666589), (77, 268367), (121, 170779), (217, 95227), (341, 60599), (787, 26257), (847, 24397), (2387, 8657), (3751, 5509)]