256000520

素因数分解:

$2^3\times 5^1\times {\mathrm{6400013}}^1$

素因数の和:6400024

約数の個数: 16

約数和(自身を含む): 576001260

約数和(自身を除く): 320000740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6400013, 12800026, 25600052, 32000065, 51200104, 64000130, 128000260, 256000520]

約数ペア:

[(1, 256000520), (2, 128000260), (4, 64000130), (5, 51200104), (8, 32000065), (10, 25600052), (20, 12800026), (40, 6400013)]