687400

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{491}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 1830240

約数和(自身を除く): 1142840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 50, 56, 70, 100, 140, 175, 200, 280, 350, 491, 700, 982, 1400, 1964, 2455, 3437, 3928, 4910, 6874, 9820, 12275, 13748, 17185, 19640, 24550, 27496, 34370, 49100, 68740, 85925, 98200, 137480, 171850, 343700, 687400]

約数ペア:

[(1, 687400), (2, 343700), (4, 171850), (5, 137480), (7, 98200), (8, 85925), (10, 68740), (14, 49100), (20, 34370), (25, 27496), (28, 24550), (35, 19640), (40, 17185), (50, 13748), (56, 12275), (70, 9820), (100, 6874), (140, 4910), (175, 3928), (200, 3437), (280, 2455), (350, 1964), (491, 1400), (700, 982)]