20988171

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{193}}^1\times {\mathrm{281}}^1$

素因数の和:523

約数の個数: 24

約数和(自身を含む): 31292976

約数和(自身を除く): 10304805

約数列:

[1, 3, 9, 43, 129, 193, 281, 387, 579, 843, 1737, 2529, 8299, 12083, 24897, 36249, 54233, 74691, 108747, 162699, 488097, 2332019, 6996057, 20988171]

約数ペア:

[(1, 20988171), (3, 6996057), (9, 2332019), (43, 488097), (129, 162699), (193, 108747), (281, 74691), (387, 54233), (579, 36249), (843, 24897), (1737, 12083), (2529, 8299)]