21864275

素因数分解:

$5^2\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 28216944

約数和(自身を除く): 6352669

約数列:

[1, 5, 25, 41, 83, 205, 257, 415, 1025, 1285, 2075, 3403, 6425, 10537, 17015, 21331, 52685, 85075, 106655, 263425, 533275, 874571, 4372855, 21864275]

約数ペア:

[(1, 21864275), (5, 4372855), (25, 874571), (41, 533275), (83, 263425), (205, 106655), (257, 85075), (415, 52685), (1025, 21331), (1285, 17015), (2075, 10537), (3403, 6425)]