21578755

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{163}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 29756160

約数和(自身を除く): 8177405

約数列:

[1, 5, 11, 29, 55, 83, 145, 163, 319, 415, 815, 913, 1595, 1793, 2407, 4565, 4727, 8965, 12035, 13529, 23635, 26477, 51997, 67645, 132385, 148819, 259985, 392341, 744095, 1961705, 4315751, 21578755]

約数ペア:

[(1, 21578755), (5, 4315751), (11, 1961705), (29, 744095), (55, 392341), (83, 259985), (145, 148819), (163, 132385), (319, 67645), (415, 51997), (815, 26477), (913, 23635), (1595, 13529), (1793, 12035), (2407, 8965), (4565, 4727)]