19720820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{140863}}^1$

素因数の和:140879

約数の個数: 24

約数和(自身を含む): 47330304

約数和(自身を除く): 27609484

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 140863, 281726, 563452, 704315, 986041, 1408630, 1972082, 2817260, 3944164, 4930205, 9860410, 19720820]

約数ペア:

[(1, 19720820), (2, 9860410), (4, 4930205), (5, 3944164), (7, 2817260), (10, 1972082), (14, 1408630), (20, 986041), (28, 704315), (35, 563452), (70, 281726), (140, 140863)]