20997904

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32009}}^1$

素因数の和:32058

約数の個数: 20

約数和(自身を含む): 41677020

約数和(自身を除く): 20679116

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32009, 64018, 128036, 256072, 512144, 1312369, 2624738, 5249476, 10498952, 20997904]

約数ペア:

[(1, 20997904), (2, 10498952), (4, 5249476), (8, 2624738), (16, 1312369), (41, 512144), (82, 256072), (164, 128036), (328, 64018), (656, 32009)]