21016580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80833}}^1$

素因数の和:80855

約数の個数: 24

約数和(自身を含む): 47530392

約数和(自身を除く): 26513812

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80833, 161666, 323332, 404165, 808330, 1050829, 1616660, 2101658, 4203316, 5254145, 10508290, 21016580]

約数ペア:

[(1, 21016580), (2, 10508290), (4, 5254145), (5, 4203316), (10, 2101658), (13, 1616660), (20, 1050829), (26, 808330), (52, 404165), (65, 323332), (130, 161666), (260, 80833)]