18919540

素因数分解:

$2^2\times 5^1\times {\mathrm{853}}^1\times {\mathrm{1109}}^1$

素因数の和:1971

約数の個数: 24

約数和(自身を含む): 39813480

約数和(自身を除く): 20893940

約数列:

[1, 2, 4, 5, 10, 20, 853, 1109, 1706, 2218, 3412, 4265, 4436, 5545, 8530, 11090, 17060, 22180, 945977, 1891954, 3783908, 4729885, 9459770, 18919540]

約数ペア:

[(1, 18919540), (2, 9459770), (4, 4729885), (5, 3783908), (10, 1891954), (20, 945977), (853, 22180), (1109, 17060), (1706, 11090), (2218, 8530), (3412, 5545), (4265, 4436)]