81354476

素因数分解:

$2^2\times 7^1\times {\mathrm{139}}^1\times {\mathrm{20903}}^1$

素因数の和:21053

約数の個数: 24

約数和(自身を含む): 163887360

約数和(自身を除く): 82532884

約数列:

[1, 2, 4, 7, 14, 28, 139, 278, 556, 973, 1946, 3892, 20903, 41806, 83612, 146321, 292642, 585284, 2905517, 5811034, 11622068, 20338619, 40677238, 81354476]

約数ペア:

[(1, 81354476), (2, 40677238), (4, 20338619), (7, 11622068), (14, 5811034), (28, 2905517), (139, 585284), (278, 292642), (556, 146321), (973, 83612), (1946, 41806), (3892, 20903)]