20642279

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{101}}^1$

素因数の和:255

約数の個数: 24

約数和(自身を含む): 25069968

約数和(自身を除く): 4427689

約数列:

[1, 7, 43, 49, 97, 101, 301, 679, 707, 2107, 4171, 4343, 4753, 4949, 9797, 29197, 30401, 68579, 204379, 212807, 421271, 480053, 2948897, 20642279]

約数ペア:

[(1, 20642279), (7, 2948897), (43, 480053), (49, 421271), (97, 212807), (101, 204379), (301, 68579), (679, 30401), (707, 29197), (2107, 9797), (4171, 4949), (4343, 4753)]