256081640

素因数分解:

$2^3\times 5^1\times {\mathrm{6402041}}^1$

素因数の和:6402052

約数の個数: 16

約数和(自身を含む): 576183780

約数和(自身を除く): 320102140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6402041, 12804082, 25608164, 32010205, 51216328, 64020410, 128040820, 256081640]

約数ペア:

[(1, 256081640), (2, 128040820), (4, 64020410), (5, 51216328), (8, 32010205), (10, 25608164), (20, 12804082), (40, 6402041)]