661040

素因数分解:

$2^4\times 5^1\times {\mathrm{8263}}^1$

素因数の和:8276

約数の個数: 20

約数和(自身を含む): 1537104

約数和(自身を除く): 876064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 8263, 16526, 33052, 41315, 66104, 82630, 132208, 165260, 330520, 661040]

約数ペア:

[(1, 661040), (2, 330520), (4, 165260), (5, 132208), (8, 82630), (10, 66104), (16, 41315), (20, 33052), (40, 16526), (80, 8263)]