21128404

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{631}}^1\times {\mathrm{761}}^1$

素因数の和:1407

約数の個数: 24

約数和(自身を含む): 40453056

約数和(自身を除く): 19324652

約数列:

[1, 2, 4, 11, 22, 44, 631, 761, 1262, 1522, 2524, 3044, 6941, 8371, 13882, 16742, 27764, 33484, 480191, 960382, 1920764, 5282101, 10564202, 21128404]

約数ペア:

[(1, 21128404), (2, 10564202), (4, 5282101), (11, 1920764), (22, 960382), (44, 480191), (631, 33484), (761, 27764), (1262, 16742), (1522, 13882), (2524, 8371), (3044, 6941)]