21897490

素因数分解:

$2^1\times 5^1\times {\mathrm{443}}^1\times {\mathrm{4943}}^1$

素因数の和:5393

約数の個数: 16

約数和(自身を含む): 39512448

約数和(自身を除く): 17614958

約数列:

[1, 2, 5, 10, 443, 886, 2215, 4430, 4943, 9886, 24715, 49430, 2189749, 4379498, 10948745, 21897490]

約数ペア:

[(1, 21897490), (2, 10948745), (5, 4379498), (10, 2189749), (443, 49430), (886, 24715), (2215, 9886), (4430, 4943)]