2490220

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1399}}^1$

素因数の和:1497

約数の個数: 24

約数和(自身を含む): 5292000

約数和(自身を除く): 2801780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1399, 1780, 2798, 5596, 6995, 13990, 27980, 124511, 249022, 498044, 622555, 1245110, 2490220]

約数ペア:

[(1, 2490220), (2, 1245110), (4, 622555), (5, 498044), (10, 249022), (20, 124511), (89, 27980), (178, 13990), (356, 6995), (445, 5596), (890, 2798), (1399, 1780)]