20204780

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{11351}}^1$

素因数の和:11449

約数の個数: 24

約数和(自身を含む): 42910560

約数和(自身を除く): 22705780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 11351, 22702, 45404, 56755, 113510, 227020, 1010239, 2020478, 4040956, 5051195, 10102390, 20204780]

約数ペア:

[(1, 20204780), (2, 10102390), (4, 5051195), (5, 4040956), (10, 2020478), (20, 1010239), (89, 227020), (178, 113510), (356, 56755), (445, 45404), (890, 22702), (1780, 11351)]