21280391

素因数分解:

${\mathrm{11}}^2\times {\mathrm{397}}^1\times {\mathrm{443}}^1$

素因数の和:862

約数の個数: 12

約数和(自身を含む): 23502696

約数和(自身を除く): 2222305

約数列:

[1, 11, 121, 397, 443, 4367, 4873, 48037, 53603, 175871, 1934581, 21280391]

約数ペア:

[(1, 21280391), (11, 1934581), (121, 175871), (397, 53603), (443, 48037), (4367, 4873)]