18728521

素因数分解:

$7^1\times {\mathrm{43}}^2\times {\mathrm{1447}}^1$

素因数の和:1540

約数の個数: 12

約数和(自身を含む): 21928512

約数和(自身を除く): 3199991

約数列:

[1, 7, 43, 301, 1447, 1849, 10129, 12943, 62221, 435547, 2675503, 18728521]

約数ペア:

[(1, 18728521), (7, 2675503), (43, 435547), (301, 62221), (1447, 12943), (1849, 10129)]