640480

素因数分解:

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

素因数の和:4018

約数の個数: 24

約数和(自身を含む): 1513512

約数和(自身を除く): 873032

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 4003, 8006, 16012, 20015, 32024, 40030, 64048, 80060, 128096, 160120, 320240, 640480]

約数ペア:

[(1, 640480), (2, 320240), (4, 160120), (5, 128096), (8, 80060), (10, 64048), (16, 40030), (20, 32024), (32, 20015), (40, 16012), (80, 8006), (160, 4003)]