20875556

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{30881}}^1$

素因数の和:30911

約数の個数: 18

約数和(自身を含む): 39559842

約数和(自身を除く): 18684286

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 30881, 61762, 123524, 401453, 802906, 1605812, 5218889, 10437778, 20875556]

約数ペア:

[(1, 20875556), (2, 10437778), (4, 5218889), (13, 1605812), (26, 802906), (52, 401453), (169, 123524), (338, 61762), (676, 30881)]