21365864

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{205441}}^1$

素因数の和:205460

約数の個数: 16

約数和(自身を含む): 43142820

約数和(自身を除く): 21776956

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 205441, 410882, 821764, 1643528, 2670733, 5341466, 10682932, 21365864]

約数ペア:

[(1, 21365864), (2, 10682932), (4, 5341466), (8, 2670733), (13, 1643528), (26, 821764), (52, 410882), (104, 205441)]