205120

素因数分解:

$2^6\times 5^1\times {\mathrm{641}}^1$

素因数の和:658

約数の個数: 28

約数和(自身を含む): 489204

約数和(自身を除く): 284084

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 641, 1282, 2564, 3205, 5128, 6410, 10256, 12820, 20512, 25640, 41024, 51280, 102560, 205120]

約数ペア:

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