21340525

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{337}}^1$

素因数の和:513

約数の個数: 24

約数和(自身を含む): 28290600

約数和(自身を除く): 6950075

約数列:

[1, 5, 17, 25, 85, 149, 337, 425, 745, 1685, 2533, 3725, 5729, 8425, 12665, 28645, 50213, 63325, 143225, 251065, 853621, 1255325, 4268105, 21340525]

約数ペア:

[(1, 21340525), (5, 4268105), (17, 1255325), (25, 853621), (85, 251065), (149, 143225), (337, 63325), (425, 50213), (745, 28645), (1685, 12665), (2533, 8425), (3725, 5729)]