256120520

素因数分解:

$2^3\times 5^1\times {\mathrm{1151}}^1\times {\mathrm{5563}}^1$

素因数の和:6725

約数の個数: 32

約数和(自身を含む): 576875520

約数和(自身を除く): 320755000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1151, 2302, 4604, 5563, 5755, 9208, 11126, 11510, 22252, 23020, 27815, 44504, 46040, 55630, 111260, 222520, 6403013, 12806026, 25612052, 32015065, 51224104, 64030130, 128060260, 256120520]

約数ペア:

[(1, 256120520), (2, 128060260), (4, 64030130), (5, 51224104), (8, 32015065), (10, 25612052), (20, 12806026), (40, 6403013), (1151, 222520), (2302, 111260), (4604, 55630), (5563, 46040), (5755, 44504), (9208, 27815), (11126, 23020), (11510, 22252)]