7840

素因数分解:

$2^5\times 5^1\times 7^2$

素因数の和:29

約数の個数: 36

約数和(自身を含む): 21546

約数和(自身を除く): 13706

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 49, 56, 70, 80, 98, 112, 140, 160, 196, 224, 245, 280, 392, 490, 560, 784, 980, 1120, 1568, 1960, 3920, 7840]

約数ペア:

[(1, 7840), (2, 3920), (4, 1960), (5, 1568), (7, 1120), (8, 980), (10, 784), (14, 560), (16, 490), (20, 392), (28, 280), (32, 245), (35, 224), (40, 196), (49, 160), (56, 140), (70, 112), (80, 98)]