2991989

素因数分解:

$7^3\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1$

素因数の和:106

約数の個数: 32

約数和(自身を含む): 4166400

約数和(自身を除く): 1174411

約数列:

[1, 7, 11, 13, 49, 61, 77, 91, 143, 343, 427, 539, 637, 671, 793, 1001, 2989, 3773, 4459, 4697, 5551, 7007, 8723, 20923, 32879, 38857, 49049, 61061, 230153, 271999, 427427, 2991989]

約数ペア:

[(1, 2991989), (7, 427427), (11, 271999), (13, 230153), (49, 61061), (61, 49049), (77, 38857), (91, 32879), (143, 20923), (343, 8723), (427, 7007), (539, 5551), (637, 4697), (671, 4459), (793, 3773), (1001, 2989)]