128137280

素因数分解:

$2^6\times 5^1\times {\mathrm{400429}}^1$

素因数の和:400446

約数の個数: 28

約数和(自身を含む): 305127660

約数和(自身を除く): 176990380

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 400429, 800858, 1601716, 2002145, 3203432, 4004290, 6406864, 8008580, 12813728, 16017160, 25627456, 32034320, 64068640, 128137280]

約数ペア:

[(1, 128137280), (2, 64068640), (4, 32034320), (5, 25627456), (8, 16017160), (10, 12813728), (16, 8008580), (20, 6406864), (32, 4004290), (40, 3203432), (64, 2002145), (80, 1601716), (160, 800858), (320, 400429)]