2000780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{1409}}^1$

素因数の和:1489

約数の個数: 24

約数和(自身を含む): 4263840

約数和(自身を除く): 2263060

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1409, 1420, 2818, 5636, 7045, 14090, 28180, 100039, 200078, 400156, 500195, 1000390, 2000780]

約数ペア:

[(1, 2000780), (2, 1000390), (4, 500195), (5, 400156), (10, 200078), (20, 100039), (71, 28180), (142, 14090), (284, 7045), (355, 5636), (710, 2818), (1409, 1420)]