21487774

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{643}}^1$

素因数の和:701

約数の個数: 48

約数和(自身を含む): 42287616

約数和(自身を除く): 20799842

約数列:

[1, 2, 7, 11, 14, 22, 31, 49, 62, 77, 98, 154, 217, 341, 434, 539, 643, 682, 1078, 1286, 1519, 2387, 3038, 4501, 4774, 7073, 9002, 14146, 16709, 19933, 31507, 33418, 39866, 49511, 63014, 99022, 139531, 219263, 279062, 346577, 438526, 693154, 976717, 1534841, 1953434, 3069682, 10743887, 21487774]

約数ペア:

[(1, 21487774), (2, 10743887), (7, 3069682), (11, 1953434), (14, 1534841), (22, 976717), (31, 693154), (49, 438526), (62, 346577), (77, 279062), (98, 219263), (154, 139531), (217, 99022), (341, 63014), (434, 49511), (539, 39866), (643, 33418), (682, 31507), (1078, 19933), (1286, 16709), (1519, 14146), (2387, 9002), (3038, 7073), (4501, 4774)]