820480

素因数分解:

$2^8\times 5^1\times {\mathrm{641}}^1$

素因数の和:662

約数の個数: 36

約数和(自身を含む): 1968372

約数和(自身を除く): 1147892

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 641, 1280, 1282, 2564, 3205, 5128, 6410, 10256, 12820, 20512, 25640, 41024, 51280, 82048, 102560, 164096, 205120, 410240, 820480]

約数ペア:

[(1, 820480), (2, 410240), (4, 205120), (5, 164096), (8, 102560), (10, 82048), (16, 51280), (20, 41024), (32, 25640), (40, 20512), (64, 12820), (80, 10256), (128, 6410), (160, 5128), (256, 3205), (320, 2564), (640, 1282), (641, 1280)]