80005660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{6421}}^1$

素因数の和:6526

約数の個数: 48

約数和(自身を含む): 194201280

約数和(自身を除く): 114195620

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1780, 2492, 3115, 6230, 6421, 12460, 12842, 25684, 32105, 44947, 64210, 89894, 128420, 179788, 224735, 449470, 571469, 898940, 1142938, 2285876, 2857345, 4000283, 5714690, 8000566, 11429380, 16001132, 20001415, 40002830, 80005660]

約数ペア:

[(1, 80005660), (2, 40002830), (4, 20001415), (5, 16001132), (7, 11429380), (10, 8000566), (14, 5714690), (20, 4000283), (28, 2857345), (35, 2285876), (70, 1142938), (89, 898940), (140, 571469), (178, 449470), (356, 224735), (445, 179788), (623, 128420), (890, 89894), (1246, 64210), (1780, 44947), (2492, 32105), (3115, 25684), (6230, 12842), (6421, 12460)]