51603920

素因数分解:

$2^4\times 5^1\times {\mathrm{645049}}^1$

素因数の和:645062

約数の個数: 20

約数和(自身を含む): 119979300

約数和(自身を除く): 68375380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 645049, 1290098, 2580196, 3225245, 5160392, 6450490, 10320784, 12900980, 25801960, 51603920]

約数ペア:

[(1, 51603920), (2, 25801960), (4, 12900980), (5, 10320784), (8, 6450490), (10, 5160392), (16, 3225245), (20, 2580196), (40, 1290098), (80, 645049)]