21978025

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{51713}}^1$

素因数の和:51740

約数の個数: 12

約数和(自身を含む): 28856412

約数和(自身を除く): 6878387

約数列:

[1, 5, 17, 25, 85, 425, 51713, 258565, 879121, 1292825, 4395605, 21978025]

約数ペア:

[(1, 21978025), (5, 4395605), (17, 1292825), (25, 879121), (85, 258565), (425, 51713)]