1428920

素因数分解:

$2^3\times 5^1\times {\mathrm{139}}^1\times {\mathrm{257}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 3250800

約数和(自身を除く): 1821880

約数列:

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

約数ペア:

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