21054410

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{161957}}^1$

素因数の和:161977

約数の個数: 16

約数和(自身を含む): 40813416

約数和(自身を除く): 19759006

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 161957, 323914, 809785, 1619570, 2105441, 4210882, 10527205, 21054410]

約数ペア:

[(1, 21054410), (2, 10527205), (5, 4210882), (10, 2105441), (13, 1619570), (26, 809785), (65, 323914), (130, 161957)]