20871560

素因数分解:

$2^3\times 5^1\times {\mathrm{521789}}^1$

素因数の和:521800

約数の個数: 16

約数和(自身を含む): 46961100

約数和(自身を除く): 26089540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521789, 1043578, 2087156, 2608945, 4174312, 5217890, 10435780, 20871560]

約数ペア:

[(1, 20871560), (2, 10435780), (4, 5217890), (5, 4174312), (8, 2608945), (10, 2087156), (20, 1043578), (40, 521789)]