210815420

素因数分解:

$2^2\times 5^1\times {\mathrm{10540771}}^1$

素因数の和:10540780

約数の個数: 12

約数和(自身を含む): 442712424

約数和(自身を除く): 231897004

約数列:

[1, 2, 4, 5, 10, 20, 10540771, 21081542, 42163084, 52703855, 105407710, 210815420]

約数ペア:

[(1, 210815420), (2, 105407710), (4, 52703855), (5, 42163084), (10, 21081542), (20, 10540771)]