20981222

素因数分解:

$2^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1\times {\mathrm{1097}}^1$

素因数の和:1303

約数の個数: 16

約数和(自身を含む): 32175792

約数和(自身を除く): 11194570

約数列:

[1, 2, 73, 131, 146, 262, 1097, 2194, 9563, 19126, 80081, 143707, 160162, 287414, 10490611, 20981222]

約数ペア:

[(1, 20981222), (2, 10490611), (73, 287414), (131, 160162), (146, 143707), (262, 80081), (1097, 19126), (2194, 9563)]