20809901225

素因数分解:

$5^2\times {\mathrm{109}}^1\times {\mathrm{7636661}}^1$

素因数の和:7636780

約数の個数: 12

約数和(自身を含む): 26041017420

約数和(自身を除く): 5231116195

約数列:

[1, 5, 25, 109, 545, 2725, 7636661, 38183305, 190916525, 832396049, 4161980245, 20809901225]

約数ペア:

[(1, 20809901225), (5, 4161980245), (25, 832396049), (109, 190916525), (545, 38183305), (2725, 7636661)]