18916976

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{90947}}^1$

素因数の和:90968

約数の個数: 20

約数和(自身を含む): 39471432

約数和(自身を除く): 20554456

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 90947, 181894, 363788, 727576, 1182311, 1455152, 2364622, 4729244, 9458488, 18916976]

約数ペア:

[(1, 18916976), (2, 9458488), (4, 4729244), (8, 2364622), (13, 1455152), (16, 1182311), (26, 727576), (52, 363788), (104, 181894), (208, 90947)]