20571356

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{30431}}^1$

素因数の和:30461

約数の個数: 18

約数和(自身を含む): 38983392

約数和(自身を除く): 18412036

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 30431, 60862, 121724, 395603, 791206, 1582412, 5142839, 10285678, 20571356]

約数ペア:

[(1, 20571356), (2, 10285678), (4, 5142839), (13, 1582412), (26, 791206), (52, 395603), (169, 121724), (338, 60862), (676, 30431)]