21386518

素因数分解:

$2^1\times {\mathrm{37}}^2\times {\mathrm{73}}^1\times {\mathrm{107}}^1$

素因数の和:256

約数の個数: 24

約数和(自身を含む): 33734232

約数和(自身を除く): 12347714

約数列:

[1, 2, 37, 73, 74, 107, 146, 214, 1369, 2701, 2738, 3959, 5402, 7811, 7918, 15622, 99937, 146483, 199874, 289007, 292966, 578014, 10693259, 21386518]

約数ペア:

[(1, 21386518), (2, 10693259), (37, 578014), (73, 292966), (74, 289007), (107, 199874), (146, 146483), (214, 99937), (1369, 15622), (2701, 7918), (2738, 7811), (3959, 5402)]