51640280

素因数分解:

$2^3\times 5^1\times {\mathrm{1291007}}^1$

素因数の和:1291018

約数の個数: 16

約数和(自身を含む): 116190720

約数和(自身を除く): 64550440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1291007, 2582014, 5164028, 6455035, 10328056, 12910070, 25820140, 51640280]

約数ペア:

[(1, 51640280), (2, 25820140), (4, 12910070), (5, 10328056), (8, 6455035), (10, 5164028), (20, 2582014), (40, 1291007)]