21093905

素因数分解:

$5^1\times 7^1\times {\mathrm{727}}^1\times {\mathrm{829}}^1$

素因数の和:1568

約数の個数: 16

約数和(自身を含む): 29003520

約数和(自身を除く): 7909615

約数列:

[1, 5, 7, 35, 727, 829, 3635, 4145, 5089, 5803, 25445, 29015, 602683, 3013415, 4218781, 21093905]

約数ペア:

[(1, 21093905), (5, 4218781), (7, 3013415), (35, 602683), (727, 29015), (829, 25445), (3635, 5803), (4145, 5089)]