20557870

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{47809}}^1$

素因数の和:47859

約数の個数: 16

約数和(自身を含む): 37865520

約数和(自身を除く): 17307650

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 47809, 95618, 239045, 478090, 2055787, 4111574, 10278935, 20557870]

約数ペア:

[(1, 20557870), (2, 10278935), (5, 4111574), (10, 2055787), (43, 478090), (86, 239045), (215, 95618), (430, 47809)]