28345681

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:361

約数の個数: 32

約数和(自身を含む): 37594368

約数和(自身を除く): 9248687

約数列:

[1, 7, 13, 17, 73, 91, 119, 221, 251, 511, 949, 1241, 1547, 1757, 3263, 4267, 6643, 8687, 16133, 18323, 22841, 29869, 55471, 112931, 128261, 238199, 311491, 388297, 1667393, 2180437, 4049383, 28345681]

約数ペア:

[(1, 28345681), (7, 4049383), (13, 2180437), (17, 1667393), (73, 388297), (91, 311491), (119, 238199), (221, 128261), (251, 112931), (511, 55471), (949, 29869), (1241, 22841), (1547, 18323), (1757, 16133), (3263, 8687), (4267, 6643)]