21528065

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{73}}^1\times {\mathrm{349}}^1$

素因数の和:453

約数の個数: 24

約数和(自身を含む): 28438200

約数和(自身を除く): 6910135

約数列:

[1, 5, 13, 65, 73, 169, 349, 365, 845, 949, 1745, 4537, 4745, 12337, 22685, 25477, 58981, 61685, 127385, 294905, 331201, 1656005, 4305613, 21528065]

約数ペア:

[(1, 21528065), (5, 4305613), (13, 1656005), (65, 331201), (73, 294905), (169, 127385), (349, 61685), (365, 58981), (845, 25477), (949, 22685), (1745, 12337), (4537, 4745)]