20871080

素因数分解:

$2^3\times 5^1\times {\mathrm{521777}}^1$

素因数の和:521788

約数の個数: 16

約数和(自身を含む): 46960020

約数和(自身を除く): 26088940

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 521777, 1043554, 2087108, 2608885, 4174216, 5217770, 10435540, 20871080]

約数ペア:

[(1, 20871080), (2, 10435540), (4, 5217770), (5, 4174216), (8, 2608885), (10, 2087108), (20, 1043554), (40, 521777)]