18900000025

素因数分解:

$5^2\times {\mathrm{2521}}^1\times {\mathrm{299881}}^1$

素因数の和:302412

約数の個数: 12

約数和(自身を含む): 23445374524

約数和(自身を除く): 4545374499

約数列:

[1, 5, 25, 2521, 12605, 63025, 299881, 1499405, 7497025, 756000001, 3780000005, 18900000025]

約数ペア:

[(1, 18900000025), (5, 3780000005), (25, 756000001), (2521, 7497025), (12605, 1499405), (63025, 299881)]