28087857

素因数分解:

$3^3\times 7^1\times {\mathrm{353}}^1\times {\mathrm{421}}^1$

素因数の和:790

約数の個数: 32

約数和(自身を含む): 47804160

約数和(自身を除く): 19716303

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 353, 421, 1059, 1263, 2471, 2947, 3177, 3789, 7413, 8841, 9531, 11367, 22239, 26523, 66717, 79569, 148613, 445839, 1040291, 1337517, 3120873, 4012551, 9362619, 28087857]

約数ペア:

[(1, 28087857), (3, 9362619), (7, 4012551), (9, 3120873), (21, 1337517), (27, 1040291), (63, 445839), (189, 148613), (353, 79569), (421, 66717), (1059, 26523), (1263, 22239), (2471, 11367), (2947, 9531), (3177, 8841), (3789, 7413)]