20989904

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{100913}}^1$

素因数の和:100934

約数の個数: 20

約数和(自身を含む): 43796676

約数和(自身を除く): 22806772

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 100913, 201826, 403652, 807304, 1311869, 1614608, 2623738, 5247476, 10494952, 20989904]

約数ペア:

[(1, 20989904), (2, 10494952), (4, 5247476), (8, 2623738), (13, 1614608), (16, 1311869), (26, 807304), (52, 403652), (104, 201826), (208, 100913)]