20890881

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2371}}^1$

素因数の和:2477

約数の個数: 24

約数和(自身を含む): 33302880

約数和(自身を除く): 12411999

約数列:

[1, 3, 9, 11, 33, 89, 99, 267, 801, 979, 2371, 2937, 7113, 8811, 21339, 26081, 78243, 211019, 234729, 633057, 1899171, 2321209, 6963627, 20890881]

約数ペア:

[(1, 20890881), (3, 6963627), (9, 2321209), (11, 1899171), (33, 633057), (89, 234729), (99, 211019), (267, 78243), (801, 26081), (979, 21339), (2371, 8811), (2937, 7113)]