28112427

素因数分解:

$3^6\times 7^2\times {\mathrm{787}}^1$

素因数の和:819

約数の個数: 42

約数和(自身を含む): 49093188

約数和(自身を除く): 20980761

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 243, 441, 567, 729, 787, 1323, 1701, 2361, 3969, 5103, 5509, 7083, 11907, 16527, 21249, 35721, 38563, 49581, 63747, 115689, 148743, 191241, 347067, 446229, 573723, 1041201, 1338687, 3123603, 4016061, 9370809, 28112427]

約数ペア:

[(1, 28112427), (3, 9370809), (7, 4016061), (9, 3123603), (21, 1338687), (27, 1041201), (49, 573723), (63, 446229), (81, 347067), (147, 191241), (189, 148743), (243, 115689), (441, 63747), (567, 49581), (729, 38563), (787, 35721), (1323, 21249), (1701, 16527), (2361, 11907), (3969, 7083), (5103, 5509)]