3920

素因数分解:

$2^4\times 5^1\times 7^2$

素因数の和:27

約数の個数: 30

約数和(自身を含む): 10602

約数和(自身を除く): 6682

約数列:

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

約数ペア:

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