20210267

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{223}}^1$

素因数の和:359

約数の個数: 24

約数和(自身を含む): 25740288

約数和(自身を除く): 5530021

約数列:

[1, 7, 11, 77, 107, 121, 223, 749, 847, 1177, 1561, 2453, 8239, 12947, 17171, 23861, 26983, 90629, 167027, 188881, 262471, 1837297, 2887181, 20210267]

約数ペア:

[(1, 20210267), (7, 2887181), (11, 1837297), (77, 262471), (107, 188881), (121, 167027), (223, 90629), (749, 26983), (847, 23861), (1177, 17171), (1561, 12947), (2453, 8239)]