21325475

素因数分解:

$5^2\times {\mathrm{821}}^1\times {\mathrm{1039}}^1$

素因数の和:1870

約数の個数: 12

約数和(自身を含む): 26501280

約数和(自身を除く): 5175805

約数列:

[1, 5, 25, 821, 1039, 4105, 5195, 20525, 25975, 853019, 4265095, 21325475]

約数ペア:

[(1, 21325475), (5, 4265095), (25, 853019), (821, 25975), (1039, 20525), (4105, 5195)]