21509554

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{42509}}^1$

素因数の和:42545

約数の個数: 16

約数和(自身を含む): 36728640

約数和(自身を除く): 15219086

約数列:

[1, 2, 11, 22, 23, 46, 253, 506, 42509, 85018, 467599, 935198, 977707, 1955414, 10754777, 21509554]

約数ペア:

[(1, 21509554), (2, 10754777), (11, 1955414), (22, 977707), (23, 935198), (46, 467599), (253, 85018), (506, 42509)]