18991390

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{172649}}^1$

素因数の和:172667

約数の個数: 16

約数和(自身を含む): 37292400

約数和(自身を除く): 18301010

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 172649, 345298, 863245, 1726490, 1899139, 3798278, 9495695, 18991390]

約数ペア:

[(1, 18991390), (2, 9495695), (5, 3798278), (10, 1899139), (11, 1726490), (22, 863245), (55, 345298), (110, 172649)]