20902804

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{12967}}^1$

素因数の和:13015

約数の個数: 24

約数和(自身を含む): 40667648

約数和(自身を除く): 19764844

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 403, 806, 1612, 12967, 25934, 51868, 168571, 337142, 401977, 674284, 803954, 1607908, 5225701, 10451402, 20902804]

約数ペア:

[(1, 20902804), (2, 10451402), (4, 5225701), (13, 1607908), (26, 803954), (31, 674284), (52, 401977), (62, 337142), (124, 168571), (403, 51868), (806, 25934), (1612, 12967)]