21009760

素因数分解:

$2^5\times 5^1\times {\mathrm{131311}}^1$

素因数の和:131326

約数の個数: 24

約数和(自身を含む): 49635936

約数和(自身を除く): 28626176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 131311, 262622, 525244, 656555, 1050488, 1313110, 2100976, 2626220, 4201952, 5252440, 10504880, 21009760]

約数ペア:

[(1, 21009760), (2, 10504880), (4, 5252440), (5, 4201952), (8, 2626220), (10, 2100976), (16, 1313110), (20, 1050488), (32, 656555), (40, 525244), (80, 262622), (160, 131311)]