21490664

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206641}}^1$

素因数の和:206660

約数の個数: 16

約数和(自身を含む): 43394820

約数和(自身を除く): 21904156

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206641, 413282, 826564, 1653128, 2686333, 5372666, 10745332, 21490664]

約数ペア:

[(1, 21490664), (2, 10745332), (4, 5372666), (8, 2686333), (13, 1653128), (26, 826564), (52, 413282), (104, 206641)]