21688865

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{2837}}^1$

素因数の和:2992

約数の個数: 16

約数和(自身を含む): 28607040

約数和(自身を除く): 6918175

約数列:

[1, 5, 11, 55, 139, 695, 1529, 2837, 7645, 14185, 31207, 156035, 394343, 1971715, 4337773, 21688865]

約数ペア:

[(1, 21688865), (5, 4337773), (11, 1971715), (55, 394343), (139, 156035), (695, 31207), (1529, 14185), (2837, 7645)]