640960

素因数分解:

$2^6\times 5^1\times {\mathrm{2003}}^1$

素因数の和:2020

約数の個数: 28

約数和(自身を含む): 1527048

約数和(自身を除く): 886088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 2003, 4006, 8012, 10015, 16024, 20030, 32048, 40060, 64096, 80120, 128192, 160240, 320480, 640960]

約数ペア:

[(1, 640960), (2, 320480), (4, 160240), (5, 128192), (8, 80120), (10, 64096), (16, 40060), (20, 32048), (32, 20030), (40, 16024), (64, 10015), (80, 8012), (160, 4006), (320, 2003)]