19984996

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{277}}^1\times {\mathrm{1061}}^1$

素因数の和:1359

約数の個数: 24

約数和(自身を含む): 37199736

約数和(自身を除く): 17214740

約数列:

[1, 2, 4, 17, 34, 68, 277, 554, 1061, 1108, 2122, 4244, 4709, 9418, 18037, 18836, 36074, 72148, 293897, 587794, 1175588, 4996249, 9992498, 19984996]

約数ペア:

[(1, 19984996), (2, 9992498), (4, 4996249), (17, 1175588), (34, 587794), (68, 293897), (277, 72148), (554, 36074), (1061, 18836), (1108, 18037), (2122, 9418), (4244, 4709)]