664880

素因数分解:

$2^4\times 5^1\times {\mathrm{8311}}^1$

素因数の和:8324

約数の個数: 20

約数和(自身を含む): 1546032

約数和(自身を除く): 881152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8311, 16622, 33244, 41555, 66488, 83110, 132976, 166220, 332440, 664880]

約数ペア:

[(1, 664880), (2, 332440), (4, 166220), (5, 132976), (8, 83110), (10, 66488), (16, 41555), (20, 33244), (40, 16622), (80, 8311)]