20568779

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{1231}}^1$

素因数の和:1287

約数の個数: 24

約数和(自身を含む): 26966016

約数和(自身を除く): 6397237

約数列:

[1, 7, 11, 31, 49, 77, 217, 341, 539, 1231, 1519, 2387, 8617, 13541, 16709, 38161, 60319, 94787, 267127, 419771, 663509, 1869889, 2938397, 20568779]

約数ペア:

[(1, 20568779), (7, 2938397), (11, 1869889), (31, 663509), (49, 419771), (77, 267127), (217, 94787), (341, 60319), (539, 38161), (1231, 16709), (1519, 13541), (2387, 8617)]