21000455510

素因数分解:

$2^1\times 5^1\times {\mathrm{1949}}^1\times {\mathrm{1077499}}^1$

素因数の和:1079455

約数の個数: 16

約数和(自身を含む): 37820250000

約数和(自身を除く): 16819794490

約数列:

[1, 2, 5, 10, 1949, 3898, 9745, 19490, 1077499, 2154998, 5387495, 10774990, 2100045551, 4200091102, 10500227755, 21000455510]

約数ペア:

[(1, 21000455510), (2, 10500227755), (5, 4200091102), (10, 2100045551), (1949, 10774990), (3898, 5387495), (9745, 2154998), (19490, 1077499)]