20909553

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43291}}^1$

素因数の和:43324

約数の個数: 16

約数和(自身を含む): 33248256

約数和(自身を除く): 12338703

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 43291, 129873, 303037, 909111, 995693, 2987079, 6969851, 20909553]

約数ペア:

[(1, 20909553), (3, 6969851), (7, 2987079), (21, 995693), (23, 909111), (69, 303037), (161, 129873), (483, 43291)]