21780226

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{12503}}^1$

素因数の和:12585

約数の個数: 16

約数和(自身を含む): 35711424

約数和(自身を除く): 13931198

約数列:

[1, 2, 13, 26, 67, 134, 871, 1742, 12503, 25006, 162539, 325078, 837701, 1675402, 10890113, 21780226]

約数ペア:

[(1, 21780226), (2, 10890113), (13, 1675402), (26, 837701), (67, 325078), (134, 162539), (871, 25006), (1742, 12503)]