21052780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{150377}}^1$

素因数の和:150393

約数の個数: 24

約数和(自身を含む): 50527008

約数和(自身を除く): 29474228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 150377, 300754, 601508, 751885, 1052639, 1503770, 2105278, 3007540, 4210556, 5263195, 10526390, 21052780]

約数ペア:

[(1, 21052780), (2, 10526390), (4, 5263195), (5, 4210556), (7, 3007540), (10, 2105278), (14, 1503770), (20, 1052639), (28, 751885), (35, 601508), (70, 300754), (140, 150377)]