2800

素因数分解:

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

素因数の和:25

約数の個数: 30

約数和(自身を含む): 7688

約数和(自身を除く): 4888

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 50, 56, 70, 80, 100, 112, 140, 175, 200, 280, 350, 400, 560, 700, 1400, 2800]

約数ペア:

[(1, 2800), (2, 1400), (4, 700), (5, 560), (7, 400), (8, 350), (10, 280), (14, 200), (16, 175), (20, 140), (25, 112), (28, 100), (35, 80), (40, 70), (50, 56)]