65281280

素因数分解:

$2^8\times 5^1\times {\mathrm{51001}}^1$

素因数の和:51022

約数の個数: 36

約数和(自身を含む): 156372132

約数和(自身を除く): 91090852

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 640, 1280, 51001, 102002, 204004, 255005, 408008, 510010, 816016, 1020020, 1632032, 2040040, 3264064, 4080080, 6528128, 8160160, 13056256, 16320320, 32640640, 65281280]

約数ペア:

[(1, 65281280), (2, 32640640), (4, 16320320), (5, 13056256), (8, 8160160), (10, 6528128), (16, 4080080), (20, 3264064), (32, 2040040), (40, 1632032), (64, 1020020), (80, 816016), (128, 510010), (160, 408008), (256, 255005), (320, 204004), (640, 102002), (1280, 51001)]