21400885

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{9049}}^1$

素因数の和:9108

約数の個数: 16

約数和(自身を含む): 28670400

約数和(自身を除く): 7269515

約数列:

[1, 5, 11, 43, 55, 215, 473, 2365, 9049, 45245, 99539, 389107, 497695, 1945535, 4280177, 21400885]

約数ペア:

[(1, 21400885), (5, 4280177), (11, 1945535), (43, 497695), (55, 389107), (215, 99539), (473, 45245), (2365, 9049)]