21553679

素因数分解:

$7^2\times {\mathrm{61}}^1\times {\mathrm{7211}}^1$

素因数の和:7286

約数の個数: 12

約数和(自身を含む): 25487208

約数和(自身を除く): 3933529

約数列:

[1, 7, 49, 61, 427, 2989, 7211, 50477, 353339, 439871, 3079097, 21553679]

約数ペア:

[(1, 21553679), (7, 3079097), (49, 439871), (61, 353339), (427, 50477), (2989, 7211)]