21000618128

素因数分解:

$2^4\times 7^1\times {\mathrm{187505519}}^1$

素因数の和:187505534

約数の個数: 20

約数和(自身を含む): 46501368960

約数和(自身を除く): 25500750832

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 187505519, 375011038, 750022076, 1312538633, 1500044152, 2625077266, 3000088304, 5250154532, 10500309064, 21000618128]

約数ペア:

[(1, 21000618128), (2, 10500309064), (4, 5250154532), (7, 3000088304), (8, 2625077266), (14, 1500044152), (16, 1312538633), (28, 750022076), (56, 375011038), (112, 187505519)]