21016105

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2749}}^1$

素因数の和:2904

約数の個数: 16

約数和(自身を含む): 27720000

約数和(自身を除く): 6703895

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2749, 7645, 13745, 30239, 151195, 382111, 1910555, 4203221, 21016105]

約数ペア:

[(1, 21016105), (5, 4203221), (11, 1910555), (55, 382111), (139, 151195), (695, 30239), (1529, 13745), (2749, 7645)]