81021920

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{72341}}^1$

素因数の和:72363

約数の個数: 48

約数和(自身を含む): 218762208

約数和(自身を除く): 137740288

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 70, 80, 112, 140, 160, 224, 280, 560, 1120, 72341, 144682, 289364, 361705, 506387, 578728, 723410, 1012774, 1157456, 1446820, 2025548, 2314912, 2531935, 2893640, 4051096, 5063870, 5787280, 8102192, 10127740, 11574560, 16204384, 20255480, 40510960, 81021920]

約数ペア:

[(1, 81021920), (2, 40510960), (4, 20255480), (5, 16204384), (7, 11574560), (8, 10127740), (10, 8102192), (14, 5787280), (16, 5063870), (20, 4051096), (28, 2893640), (32, 2531935), (35, 2314912), (40, 2025548), (56, 1446820), (70, 1157456), (80, 1012774), (112, 723410), (140, 578728), (160, 506387), (224, 361705), (280, 289364), (560, 144682), (1120, 72341)]