20680255

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1\times {\mathrm{1321}}^1$

素因数の和:1458

約数の個数: 16

約数和(自身を含む): 25890048

約数和(自身を除く): 5209793

約数列:

[1, 5, 31, 101, 155, 505, 1321, 3131, 6605, 15655, 40951, 133421, 204755, 667105, 4136051, 20680255]

約数ペア:

[(1, 20680255), (5, 4136051), (31, 667105), (101, 204755), (155, 133421), (505, 40951), (1321, 15655), (3131, 6605)]