20991796

素因数分解:

$2^2\times 7^2\times {\mathrm{107101}}^1$

素因数の和:107119

約数の個数: 18

約数和(自身を含む): 42733698

約数和(自身を除く): 21741902

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 107101, 214202, 428404, 749707, 1499414, 2998828, 5247949, 10495898, 20991796]

約数ペア:

[(1, 20991796), (2, 10495898), (4, 5247949), (7, 2998828), (14, 1499414), (28, 749707), (49, 428404), (98, 214202), (196, 107101)]