20916116

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{30941}}^1$

素因数の和:30971

約数の個数: 18

約数和(自身を含む): 39636702

約数和(自身を除く): 18720586

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 30941, 61882, 123764, 402233, 804466, 1608932, 5229029, 10458058, 20916116]

約数ペア:

[(1, 20916116), (2, 10458058), (4, 5229029), (13, 1608932), (26, 804466), (52, 402233), (169, 123764), (338, 61882), (676, 30941)]