20480525

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:146

約数の個数: 48

約数和(自身を含む): 29529360

約数和(自身を除く): 9048835

約数列:

[1, 5, 13, 25, 29, 41, 53, 65, 145, 205, 265, 325, 377, 533, 689, 725, 1025, 1189, 1325, 1537, 1885, 2173, 2665, 3445, 5945, 7685, 9425, 10865, 13325, 15457, 17225, 19981, 28249, 29725, 38425, 54325, 63017, 77285, 99905, 141245, 315085, 386425, 499525, 706225, 819221, 1575425, 4096105, 20480525]

約数ペア:

[(1, 20480525), (5, 4096105), (13, 1575425), (25, 819221), (29, 706225), (41, 499525), (53, 386425), (65, 315085), (145, 141245), (205, 99905), (265, 77285), (325, 63017), (377, 54325), (533, 38425), (689, 29725), (725, 28249), (1025, 19981), (1189, 17225), (1325, 15457), (1537, 13325), (1885, 10865), (2173, 9425), (2665, 7685), (3445, 5945)]