21995393

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{173}}^1\times {\mathrm{443}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 25958016

約数和(自身を除く): 3962623

約数列:

[1, 7, 41, 173, 287, 443, 1211, 3101, 7093, 18163, 49651, 76639, 127141, 536473, 3142199, 21995393]

約数ペア:

[(1, 21995393), (7, 3142199), (41, 536473), (173, 127141), (287, 76639), (443, 49651), (1211, 18163), (3101, 7093)]