19721090

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{45863}}^1$

素因数の和:45913

約数の個数: 16

約数和(自身を含む): 36324288

約数和(自身を除く): 16603198

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 45863, 91726, 229315, 458630, 1972109, 3944218, 9860545, 19721090]

約数ペア:

[(1, 19721090), (2, 9860545), (5, 3944218), (10, 1972109), (43, 458630), (86, 229315), (215, 91726), (430, 45863)]