21251153

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{443}}^1$

素因数の和:557

約数の個数: 24

約数和(自身を含む): 27332640

約数和(自身を除く): 6081487

約数列:

[1, 7, 11, 49, 77, 89, 443, 539, 623, 979, 3101, 4361, 4873, 6853, 21707, 34111, 39427, 47971, 238777, 275989, 433697, 1931923, 3035879, 21251153]

約数ペア:

[(1, 21251153), (7, 3035879), (11, 1931923), (49, 433697), (77, 275989), (89, 238777), (443, 47971), (539, 39427), (623, 34111), (979, 21707), (3101, 6853), (4361, 4873)]