21109560140

素因数分解:

$2^2\times 5^1\times {\mathrm{1055478007}}^1$

素因数の和:1055478016

約数の個数: 12

約数和(自身を含む): 44330076336

約数和(自身を除く): 23220516196

約数列:

[1, 2, 4, 5, 10, 20, 1055478007, 2110956014, 4221912028, 5277390035, 10554780070, 21109560140]

約数ペア:

[(1, 21109560140), (2, 10554780070), (4, 5277390035), (5, 4221912028), (10, 2110956014), (20, 1055478007)]