12800

素因数分解:

$2^9\times 5^2$

素因数の和:28

約数の個数: 30

約数和(自身を含む): 31713

約数和(自身を除く): 18913

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 512, 640, 800, 1280, 1600, 2560, 3200, 6400, 12800]

約数ペア:

[(1, 12800), (2, 6400), (4, 3200), (5, 2560), (8, 1600), (10, 1280), (16, 800), (20, 640), (25, 512), (32, 400), (40, 320), (50, 256), (64, 200), (80, 160), (100, 128)]