400240

素因数分解:

$2^4\times 5^1\times {\mathrm{5003}}^1$

素因数の和:5016

約数の個数: 20

約数和(自身を含む): 930744

約数和(自身を除く): 530504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5003, 10006, 20012, 25015, 40024, 50030, 80048, 100060, 200120, 400240]

約数ペア:

[(1, 400240), (2, 200120), (4, 100060), (5, 80048), (8, 50030), (10, 40024), (16, 25015), (20, 20012), (40, 10006), (80, 5003)]