20403920

素因数分解:

$2^4\times 5^1\times {\mathrm{255049}}^1$

素因数の和:255062

約数の個数: 20

約数和(自身を含む): 47439300

約数和(自身を除く): 27035380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255049, 510098, 1020196, 1275245, 2040392, 2550490, 4080784, 5100980, 10201960, 20403920]

約数ペア:

[(1, 20403920), (2, 10201960), (4, 5100980), (5, 4080784), (8, 2550490), (10, 2040392), (16, 1275245), (20, 1020196), (40, 510098), (80, 255049)]