21360025

素因数分解:

$5^2\times {\mathrm{409}}^1\times {\mathrm{2089}}^1$

素因数の和:2508

約数の個数: 12

約数和(自身を含む): 26563900

約数和(自身を除く): 5203875

約数列:

[1, 5, 25, 409, 2045, 2089, 10225, 10445, 52225, 854401, 4272005, 21360025]

約数ペア:

[(1, 21360025), (5, 4272005), (25, 854401), (409, 52225), (2045, 10445), (2089, 10225)]