645400

素因数分解:

$2^3\times 5^2\times 7^1\times {\mathrm{461}}^1$

素因数の和:484

約数の個数: 48

約数和(自身を含む): 1718640

約数和(自身を除く): 1073240

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, 461, 700, 922, 1400, 1844, 2305, 3227, 3688, 4610, 6454, 9220, 11525, 12908, 16135, 18440, 23050, 25816, 32270, 46100, 64540, 80675, 92200, 129080, 161350, 322700, 645400]

約数ペア:

[(1, 645400), (2, 322700), (4, 161350), (5, 129080), (7, 92200), (8, 80675), (10, 64540), (14, 46100), (20, 32270), (25, 25816), (28, 23050), (35, 18440), (40, 16135), (50, 12908), (56, 11525), (70, 9220), (100, 6454), (140, 4610), (175, 3688), (200, 3227), (280, 2305), (350, 1844), (461, 1400), (700, 922)]