21164961520

素因数分解:

$2^4\times 5^1\times {\mathrm{264562019}}^1$

素因数の和:264562032

約数の個数: 20

約数和(自身を含む): 49208535720

約数和(自身を除く): 28043574200

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264562019, 529124038, 1058248076, 1322810095, 2116496152, 2645620190, 4232992304, 5291240380, 10582480760, 21164961520]

約数ペア:

[(1, 21164961520), (2, 10582480760), (4, 5291240380), (5, 4232992304), (8, 2645620190), (10, 2116496152), (16, 1322810095), (20, 1058248076), (40, 529124038), (80, 264562019)]