21387916

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{313}}^1\times {\mathrm{1553}}^1$

素因数の和:1881

約数の個数: 24

約数和(自身を含む): 40988304

約数和(自身を除く): 19600388

約数列:

[1, 2, 4, 11, 22, 44, 313, 626, 1252, 1553, 3106, 3443, 6212, 6886, 13772, 17083, 34166, 68332, 486089, 972178, 1944356, 5346979, 10693958, 21387916]

約数ペア:

[(1, 21387916), (2, 10693958), (4, 5346979), (11, 1944356), (22, 972178), (44, 486089), (313, 68332), (626, 34166), (1252, 17083), (1553, 13772), (3106, 6886), (3443, 6212)]