19978288

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{113513}}^1$

素因数の和:113532

約数の個数: 20

約数和(自身を含む): 42227208

約数和(自身を除く): 22248920

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 113513, 227026, 454052, 908104, 1248643, 1816208, 2497286, 4994572, 9989144, 19978288]

約数ペア:

[(1, 19978288), (2, 9989144), (4, 4994572), (8, 2497286), (11, 1816208), (16, 1248643), (22, 908104), (44, 454052), (88, 227026), (176, 113513)]