320240

素因数分解:

$2^4\times 5^1\times {\mathrm{4003}}^1$

素因数の和:4016

約数の個数: 20

約数和(自身を含む): 744744

約数和(自身を除く): 424504

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4003, 8006, 16012, 20015, 32024, 40030, 64048, 80060, 160120, 320240]

約数ペア:

[(1, 320240), (2, 160120), (4, 80060), (5, 64048), (8, 40030), (10, 32024), (16, 20015), (20, 16012), (40, 8006), (80, 4003)]