2161225

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{271}}^1$

素因数の和:321

約数の個数: 24

約数和(自身を含む): 3035520

約数和(自身を除く): 874295

約数列:

[1, 5, 11, 25, 29, 55, 145, 271, 275, 319, 725, 1355, 1595, 2981, 6775, 7859, 7975, 14905, 39295, 74525, 86449, 196475, 432245, 2161225]

約数ペア:

[(1, 2161225), (5, 432245), (11, 196475), (25, 86449), (29, 74525), (55, 39295), (145, 14905), (271, 7975), (275, 7859), (319, 6775), (725, 2981), (1355, 1595)]