21781648

素因数分解:

$2^4\times 7^1\times {\mathrm{194479}}^1$

素因数の和:194494

約数の個数: 20

約数和(自身を含む): 48231040

約数和(自身を除く): 26449392

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 194479, 388958, 777916, 1361353, 1555832, 2722706, 3111664, 5445412, 10890824, 21781648]

約数ペア:

[(1, 21781648), (2, 10890824), (4, 5445412), (7, 3111664), (8, 2722706), (14, 1555832), (16, 1361353), (28, 777916), (56, 388958), (112, 194479)]