2857840

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:409

約数の個数: 40

約数和(自身を含む): 6718320

約数和(自身を除く): 3860480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 257, 278, 514, 556, 695, 1028, 1112, 1285, 1390, 2056, 2224, 2570, 2780, 4112, 5140, 5560, 10280, 11120, 20560, 35723, 71446, 142892, 178615, 285784, 357230, 571568, 714460, 1428920, 2857840]

約数ペア:

[(1, 2857840), (2, 1428920), (4, 714460), (5, 571568), (8, 357230), (10, 285784), (16, 178615), (20, 142892), (40, 71446), (80, 35723), (139, 20560), (257, 11120), (278, 10280), (514, 5560), (556, 5140), (695, 4112), (1028, 2780), (1112, 2570), (1285, 2224), (1390, 2056)]