666890

素因数分解:

$2^1\times 5^1\times 7^2\times {\mathrm{1361}}^1$

素因数の和:1382

約数の個数: 24

約数和(自身を含む): 1397412

約数和(自身を除く): 730522

約数列:

[1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490, 1361, 2722, 6805, 9527, 13610, 19054, 47635, 66689, 95270, 133378, 333445, 666890]

約数ペア:

[(1, 666890), (2, 333445), (5, 133378), (7, 95270), (10, 66689), (14, 47635), (35, 19054), (49, 13610), (70, 9527), (98, 6805), (245, 2722), (490, 1361)]